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Recognizes a network on Windows 7. Unidentified network without Internet access. If connected via Wi-Fi

In this article we will look at several cases when connected to Wi-Fi tablet Windows 8 displays "no internet access".

Why Wi-Fi Doesn't Guarantee Access

The first thing to understand is that Wi-Fi network does not in itself guarantee access to the Internet. It's simply a technology that allows devices to be connected wirelessly. single network.

Likewise, the routers that distribute it may not be connected to anything, but simply be used to combine devices into a single network. In order for an access point (router) to distribute the Internet, it must be connected with an Ethernet cable from the provider.

Finding the problem

Based on the above, the first thing you need to do is diagnose the problems, which will allow you to identify what exactly the reason is - in the computer ( Wi-Fi adapter) or in the router.

To produce automatic search problems, do the following:

Go to "Control Panel".
Open System and Security.
In the “Security and Maintenance” section, select “fix common PC problems.”
Next we are interested in the “Network and Internet” block - select it.
Then tap on “Internet Connection”.
In the window that opens, click “Next”.
In the next request, we need to select “Internet connection problems” and wait for the results.
After the check is completed, a report will be issued with the result found. Note: in rare cases, if a third-party specific network software, this service may not identify the problem, although there will be no Internet access. Just close the service.
If a problem is found, take the advice and choose to check again, or skip this step.
When finished, select Close Troubleshooter.

If the error is not found in the PC, you need to find out whether the Ethernet cable has come loose from the router. You can more accurately find out that everything is in order with the wire by the lit indicator on the router in the form of a planet - if this indicator is not lit, then the above problem needs to be solved.

If the indicator is lit, reboot the access point via special button or by unplugging the plug from the socket and after a while (a couple of minutes) inserting it back.

Check on another device

Windows 8 without Internet access: Video

Setting up Windows

If you can't access the Internet in Windows 8 and the troubleshooter has identified a flaw in your PC, try the solutions below.

Blocked by firewall or antivirus

This problem can be solved by changing the selected network type from “Work” or “Public” to “Home”. These settings have varying degrees of security, and the first two can block access to the Internet in order to maintain the confidentiality of files on the device.

To change you need to do the following:

Disabling the firewall

If the above does not help, you can try disabling the built-in protection. But remember that after this your Tablet PC will be more vulnerable. Although for 90% of all users this will not matter, if you store sensitive information in the device's memory, disable it at your own peril and risk.

To do this you should:

How to disable Windows 8 firewall: Video

If the DHCP server is disabled in the router

Most of all points by default give out to the newly connected device dynamic IP address. But to successfully receive it, the appropriate settings must be made on your tablet. You can check this as follows:

Reconnect to the network.

How to enable DHCP on Windows 8: Video

Setting the standard

This method is not always effective, since incompatibility with the standard rarely leads to Wi-Fi not working, but in some cases this may be the reason.

This method makes sense if your network requires a connection password.

Conclusion

We hope that among the methods provided, you found one that resolved the problem. If not, you should make the settings on your router in accordance with the relevant instructions of each access point manufacturer. Let us only note that problems may also include the following:

Broadcast channel.
The region set in the router system.
Not working DNS (IP distribution).
MAC address filter (when the Internet is accessible only to manually specified devices).

Today I will look at a situation that operating system users very often encounter. Windows 7 And Windows 8. The essence of the problem is this: there is a network connection, but Network and Sharing Center shared access writes that the Network without access to the Internet, there is about a clock next to the network icon in the tray exclamation mark. In fact, the Internet may even be accessible. There may be several reasons with different scenarios. Let's take a closer look at each of them.

But first things first, if you are connected via a modem, router or optical ONT terminal- I would advise reboot it. If, after rebooting the device, Internet access resumes, the problem is clearly in the router itself, its settings, or the provider’s network (this also happens). In this case, we reset the router with the reset button, configure it again and check. If still after some time a message appears that Network without Internet access- try another router to check.

1. WiFi network without Internet access

This is the most common situation. The reason for this problem is most often the following. The vast majority of users are not aware at all what is an IP address and believes that For Wi-Fi connections You just need to enter the network security key. In most cases, this may indeed be enough, but not always. If on WiFi router protocol disabled DHCP, then you can easily connect to the network, but here IP address your wireless adapter it will not work on a laptop, tablet or smartphone. Accordingly, you will not have access to the Internet, although the network is actually connected, but only partially.
By the way, this is also possible with a wired connection - the cable was plugged in, but the address was not received.
What to do? Register the IP address manually. To register IP in Windows 7 or Windows 8 you need to do the following:
Let's go to Control Panel and click on the icon Network and Sharing Center:

In the window that opens, click on the link Change adapter settings. A list of network adapters will open. Right-click on the network adapter through which we connect to the router and select the menu item Properties:

The network card properties window will open. Select an item Internet Protocol Version 4 (TCP/IPv4) and double-click on it with the left mouse button. This is where you need it register IP address, netmask, gateway and DNS address:

For most routers (except D-Link) the following should be suitable:
IP address — 192.168.1.2
mask — 255.255.255.0
gateway — 192.168.1.1
primary DNS — 192.168.1.1
secondary DNS — 8.8.8.8
For D-Link routers:
IP address — 192.168.0.2
mask — 255.255.255.0
gateway — 192.168.0.1
primary DNS — 192.168.0.1
secondary DNS — 8.8.8.8

2. There is Internet access, but it still says Network without Internet access

This problem is most often occurs when a computer connects to the Internet via a proxy server . That is, there is access to the Internet, but it is not direct, but through a server.
In this case, you can do the following:
Press the button Start select an item Execute(or press the key combination Win+R ) and in the window that opens we write:
gpedit.msc
it will be revealed to you Local Group Policy Editor.
Local Computer Policy → Computer configuration → Administrative Templates → System → Internet Communication Management → Internet communication settings and enable the parameter:
« Disable active sensing for status indicator network connection «

At least once in his life, every computer or laptop user has encountered the problem of connecting and setting up the Internet on his device. One such case is when, when connecting an Ethernet cable ( network cable) to a PC or connected to a WiFi network, instead of the computer accessing the Internet, you receive the message “Unidentified network”, and on the network connection icon, which is located in the panel near the clock, appears yellow triangle with an exclamation point.

This can happen both when connecting to the network for the first time, and after rebooting the laptop or PC, and even on computers with just installed system Windows.

The reasons for the problem are different and next we will look at ways to solve them.

Incorrect network card settings - IP address problem

Occurs if network card an IP address was manually assigned and when connecting to new network she can't get another one. To check this, follow these steps:

Step 1 Open the START menu and select Control Panel

Step 2 Find the program Network and Sharing Center and run it

Step 3 In the window that opens, in the left panel, select Changing adapter settings

Step 4 Now select the network connection through which you are trying to access the Internet, right-click on it and context menu select Properties

Step 5 In the connection properties window, select Internet Protocol Version 4 (TCP/IPv4) and click on the Properties button, which is located just below

Step 6 Check the specified parameters in the window that opens:

if you connect to WiFi networks or use an Ethernet cable from the router, then check the boxes for automatic receipt so that the computer can receive a new address

if you connected the Internet cable directly to the computer, bypassing WiFi router, and your provider provides access to the Internet bound by IP address - check the specified parameters (IP address, gateway and DNS server addresses), they can be found in the contract or contact the provider’s technical support

Problems with the TCP/IP protocol

Occurs when internal errors TCP/IP, which requires resetting the protocol settings.

Step 1 Launch the program Command line (cmd.exe) as administrator

Step 2 Type the command: netsh int ip reset resetlog.txt and press Enter

Step 3 Restart your computer

Network card drivers

Occurs when after Windows installations Drivers for the network card are automatically installed by the OS itself or you use a driver pack. This problem often appears on laptops and to fix it, you need to install drivers from the official website of the laptop or computer network card manufacturer.

Problems with DHCP

Most often occurs when you first connect an Internet cable or local network to a laptop or computer. To check this, open a command prompt and enter the command: ipconfig

If in the IP address or default gateway line you see the following address: 169.254.x.x- this means the system was unable to obtain an IP address automatically and the problem lies precisely in DHCP.

In this case, follow these steps:

Step 1 Open Windows Device Manager. To do this, press the Win+R key combination on your keyboard and enter the command in the window that appears: devmgmt.msc

Step 2 Find the network adapter through which you are trying to connect to the Internet, click on it right click mouse and select Properties

Step 3 In the window that opens, go to the Advanced tab

Step 4 Select an option Network Address / Locally Administered Address and in the field Meaning enter 12 characters (use numbers from 0 to 9 and letters from A to F), then click OK

Step 5 Go back to the program Command line and enter the following values:

ipconfig /release
ipconfig /renew

Step 6 Restart your computer and check if the error is resolved. Startup type from the drop-down menu select Disabled, and in the section State click Stop button

Step 5 Now click OK and restart your computer

We hope that at least one of the tips presented will help fix the problem with an unidentified network on your computer or laptop.

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The Internet is an integral part of our life. Lack of network is a serious problem for the user. You don't always have time to call your provider, but, fortunately, you can troubleshoot problems yourself. Below you will read about common causes of Internet problems and how to fix them.

Possible reasons for the lack of Internet on Windows 7

There are several reasons for the lack of Internet. Some of them relate to computer drivers and its equipment, others affect system errors and lack correct settings networks.

The most common reasons for lack of Internet:

mechanical damage to the cable or ports;
lack of a network card or its drivers;
incorrect connection settings on the computer or router;
presence of viral software.

The Internet may also be unavailable due to a debt on a personal account or due to a line failure. Before attempting to troubleshoot problems, check to see if these issues are causing them.

How to check network status

Among the problems with the Internet, we can highlight those that are most common and occur periodically for most users. Resolving them can be very simple. The first thing to do is check the network status.

You can do this in two ways:

In both cases, your network status will be described below your network icon.

Unidentified network without internet access

If the computer “sees” the network and connects to it, but does not gain access to the Internet, the network status will be called “Unidentified network. Without access to the Internet." What to do in this case?

The computer “sees” the network and connects to it, but does not gain access to the Internet

Reboot the router

If you have a router installed, the first thing to do is reboot it. It may simply not have time to update the data, and because of this, access to the network will be lost. The reboot is performed in the following order:

First, the router is disconnected from the network. It is important to unplug the cord from the outlet, and not to reboot using the button on the equipment - you need to stop the flow of electricity for a while.
Then the router should be left turned off for 10–15 seconds.
After this, the router is connected back to the network and wait until the indicators on it light up.

After the indication appears on the router, you can check whether Internet access is available. Usually, after a reboot, the Internet appears within 7–10 seconds.

Checking network settings

Network settings are data that allows the computer to connect to the network distributed by the provider. These settings are issued by the company providing Internet access (usually they are specified in the service agreement). Sometimes the settings on your computer go wrong, and because of this, the device cannot connect to the Internet.

In order to check the network settings, you need to open “Protocol Properties”. You can do it like this:

Go to “Control Panel” through the “Start” menu.
"Control Panel" is located in the right "Start" menu
Select "Network and Internet".
In order to find required section, you should select the “Category” viewing option on the right top corner screen
Open the Network and Sharing Center section.
In the Network Control Center you can check the connection status, create a new network, and carry out almost any action with your Internet connection
On the left, find the “Change adapter settings” section.
Find the section "Change adapter settings"
In the list of networks, select the one you need, right-click on it and find the “Properties” item. Only an administrator can open Properties.
Desired network will be called "Local Area Connection" or "Ethernet"
In the list, find the item “Internet Protocol Version 4”, select it by pressing the left mouse button once. After this, the “Properties” button under the list is activated, you need to click on it.
Selecting an item is done by clicking the left mouse button once. There is no need to uncheck the box next to the item.

When the window is open, you still need to understand what settings should be entered. There are three options:

Let's figure out what the IPoE and PPPoE protocols are, but we won't go into terminology. It is enough to understand what protocol is used on your communication line. To do this, just look at the network settings issued by the provider (specified in the contract).

The settings can be the following:

password and login are used on the PPPoE protocol,
IP address, subnet mask, gateway and DNS are used on IPoE.

If you are using PPPoE and you are connected directly, that is, you are not using a router, after checking the settings through the protocol properties, you need to recreate the network.

Return to Network and Sharing Center.
This way only PPPoE connection is configured. To configure a wired IPoE connection, use the protocol properties
Open the “Create and configure a new connection” item.
Switching items is done by single-clicking the left mouse button
Select "Create and configure a new network" and click "Next".
The selected item will be highlighted with a bright blue background
Click on the "High Speed" option.
It may take several minutes to wait while searching for available connections
If an error appears, select “Create the connection anyway.”
This error appears quite often, but a connection can still be created
Next, you will need to enter the network settings, as well as the network name - this is the name of the connection. You can use the name of the provider company or something else.
The connection name is its name, and the username and password are the network settings. It's worth noting that the password has nothing to do with the Wi-Fi key

After this, the network will be reconfigured, and you will only have to check whether you have access to the network.

Video: checking network settings on your computer

Resetting TCP/IP Settings

Sometimes problems can be caused by internal system errors. TCP/IP - set network protocols, responsible for data transfer. You can reset it as follows:

Checking drivers

The reason for the lack of access may be outdated drivers (usually this problem is associated with a recent update operating system). Let's check their condition.

In addition, by right-clicking on the driver name, you can select “Uninstall”, and then restart the computer. Then when you turn on the system will automatically install the missing driver.

After removing the drivers and restarting the computer, the system will automatically install the appropriate drivers

If there is an exclamation mark next to the driver icon, you will need to completely reinstall the drivers and check the functionality of the network card installed in the computer.

The default gateway is not available

Network diagnostics will help you detect the following problem. Right-click on your connection icon and select “Troubleshooting”.

By right-clicking on the icon you can open the “Network and Sharing Center”

If you receive a message about the gateway being unavailable after performing a system diagnostic, the following steps may help.

Prohibit disabling the network adapter to save energy

Sometimes the system turns off the network adapter - the device that allows you to connect to the Internet - to save power. Try disabling this option.

Find "Device Manager" via search bar in the Start menu.
Opening "Device Manager" through search is not the only way, but it is the most convenient
Expand the “Network Adapters” tab, select the one you need, and right-click on it.
In the context menu, click on “Properties”
Select "Properties" and open the "Power Management" tab.
Changing these settings will help solve the problem of the Internet disconnecting after the computer goes into sleep mode
Uncheck the box next to “Allow the computer to turn off this device to save power” and save your data.
After changing the settings, do not forget to save them by clicking on the “OK” button

Updating or reinstalling drivers

You can also update drivers through Device Manager: expand the Network Adapters tab, right-click on network driver and select "Update" or "Uninstall", then restart your computer.

If the action does not help, you can download drivers from their manufacturers' websites and install them yourself. Typically, manufacturers offer to download drivers from file format".exe", so to install you will only need to run the downloaded file and accept the agreement.

Video: how to reinstall drivers yourself

When connecting to the Internet through a router, error 651 occurs

This error occurs when trying to connect using the PPPoE protocol. It is rare, but it happens that users create a new high-speed connection while the provider is using the IPoE protocol. Therefore, first of all, make sure that you are using the PPPoE protocol.

After this, you will need to recreate the connection. The process is described in detail in the “Checking network settings” section (all you need to do is create a new connection through the “Network Control Center”). If this doesn't help, read on.

Disabling antivirus

Sometimes antivirus programs block access to the Internet. Often the solution to the problem is to disable the antivirus. Right-click its icon in the Control Panel and select Disable. Sometimes antiviruses block access to the network even in a “sleep” state, so you can try not only disabling, but also completely removing this software. If this action helps, please report the situation to technical support antivirus software.

Problems with the router

The cause of the problems may be several problems related to the router:

incorrectly connected cable;
incorrectly entered settings.

First try the following:

Disconnect the router from the network.
Without connecting the router, unplug the network cable from it and plug it back into the WAN/INTERNET port, making sure that the plastic clip on the plug clicks when connected.
If the cable goes from the router to the computer, disconnect it from the LAN connector on the router itself and from the network card connector on the computer, and then connect it back.
Connect the router to the network.

If access does not appear, check the network settings entered on the router. In order to log into the router, you will need to use any browser (in address bar) enter “192.168.1.1” or “192.168.0.1”. Sometimes the address at which you can log into the router is different, so if through specified addresses login is not possible, check the instructions in the instructions.

Files cannot be downloaded from the Internet

It may also happen that Internet access is active, but files are not downloaded. This problem is usually associated not with the Internet itself, but with the computer and software.

What you can try:

try to download a file from another source - perhaps you are unable to download something simply because the resource does not support downloading;
try downloading through other browsers;
check your computer for malware using any official antivirus.

Multimedia does not work on the Internet

It happens that the Internet works, but video or audio materials are not played. What to do in this case? First, check if the files downloaded to your computer are playable. Perhaps the cause of the problem lies directly in the computer's sound settings. If files are played from your computer, but not from the Internet, read on.

The first thing you need to do is understand why this problem occurs. It may be a browser error or lack of plugins. To get your computer working properly, do the following:

PPPoE diagnostics

Additionally, in order to find out the causes of errors when using PPPoE, you can use the Troubleshooting Center. Then the system will independently check for errors and offer possible solutions.

PPPoE (Point-to-Point Protocol over Ethernet) is a communication protocol over an Ethernet network that operates on a point-to-point basis and provides the user with a number of capabilities: encryption, authentication and data compression. It is necessary for the user authorization system, which makes it easier to track the time of provision and payment of network services.

Right-click the network connection icon and click the Diagnose Problems button. After this, an analysis will be performed, Windows will try to cope with the difficulties on its own, and then prompt you to perform several actions.

Error 619

Restart your computer and disable all security systems: antivirus and Windows Firewall. The latter is disabled in the following way:

Error 633

There is only one solution:

Restart your computer.
Try connecting to the Internet again.
Create a new connection.

Error 638

Main causes:

damage to the network cable;
malfunction of drivers or network card;
incorrect connection settings;
problems with network equipment(router);
presence of viruses on the computer.

First of all, do two things: check the integrity of the cable and the presence of indications on the router. Never neglect these steps when you have problems with the Internet, so as not to waste time trying to solve a problem caused by mechanical damage.

It is clear that if the cable is damaged, you need to call your provider. But if there is no indication on the router (which indicates that the device is de-energized), you should try reconnecting the router to a different outlet before replacing it.

After checking the functionality of the router and the integrity of the cable, check your computer for viruses with any antivirus program.

If the above does not help, recreate the network connection - check the correctness of the entered settings both on the router through its settings, and on the computer itself through the protocol properties. Both actions are described in detail in the previous paragraphs of the article.

Error 691

The only reason for error 691 to occur is an incorrectly entered password and login (network settings). Therefore, the first thing you need to do is recreate the connection. The process has already been described earlier - you need to go to the “Network Center”, select “Create a new connection” and then enter the correct network settings. After this, restart your computer and check your internet connection.

If the action does not help, report the problem to your provider. There may have been a line failure that caused the error.

Error 720

The easiest way to solve this problem is to reinstall the operating system. To do this, just download from the site Windows file operating system onto a disk (or purchase a disk in a store) and run it on the computer.

You can also try updating the TCP/IP protocol. The action is described above, but you can also perform a deeper operation by completely reinstalling the stack. Reinstalling the stack yourself is dangerous - you will have to work with system files, and their damage will affect the operation of the computer. Therefore, try simply updating the stack, and if the action does not help, contact your provider or professional technician for help.

Video: connection errors via PPPoE connection and their elimination

Network cable not connected

If, when checking the connection status, a message appears that the network cable is not connected, the first thing to do is actually check that it is connected correctly and is not damaged. If possible, try using a different network cable.

Make sure the cable is connected correctly. On the router, the network cable must be connected to the WAN or INTERNET port, and the cable leading from the router to the computer must be connected to LAN connector. There is usually only one port on a computer, so it will be difficult to make a mistake.

The WAN or INTERNET port is used to connect a network cable to the router, and LAN ports used for running cables to computers

Next, check the status of the router (if you have one). Its indicators should light up as usual. If there is no indication, reconnect the router to another outlet, try resetting the settings on the router (using the “Reset” or “Reset” button) and entering them again. You should reset the settings only if you are confident that you can configure the router yourself.

Also check the status of the drivers network adapter and try updating them.

Video: checking the port on the network card and the WAN port on the router

Additional check of security settings

Security settings can also be to blame for many of these problems. This applies to the case when the PPPoE protocol is used. Therefore, if the proposed operations do not help solve your case, try checking your connection security settings.

Open the "Network Connections" section.
Right click on your connection.
Open the “Security” section and set the use of “Unsecure Password” in the list that opens.

These are the main ways to diagnose connections on Windows 7 and troubleshoot problems. Do not forget that the reason for the lack of Internet may be a simple debt or a breakdown on the line. If the methods described above do not help you, contact your provider so that technical staff can diagnose and solve the problem on their end.

Hello! This error was already described on our website by my colleague, but it had not yet been formulated in this way. Yes, and there will be a little more possible solutions here, but everything is straight to the point. So, let’s look at the “Unidentified network without Internet access” problem. As always, options from me quick solution, reasons and full analysis. I suggest you start already!

The fastest solution

Reboot your computer and router! 99% of cases are quickly resolved this way! This is the first thing to do.

About others possible problems and ways to solve them, read more below.

Background

Starting with Windows 7, all modern operating systems of the Microsoft family began to “think,” analyze emerging problems and try to somehow fix them. But what’s most remarkable is that when something fails to be fixed, it tries to show errors that may not even be errors...

He turned it around. The bottom line is that when any problem with the network occurs, our favorite errors “Unidentified network” and “No Internet access” appear. It just means that there is some problem with the network. But we will find out which one below.

At the same time, a yellow exclamation mark is shown in the tray at the connection point, and the same treasured phrase appears in the tooltip when hovering or in the pop-up when clicked.

Next we begin to disassemble possible options problems and solutions. Don't forget about the reboot option above - I wasn't kidding. But if suddenly you still have some questions or problems, you couldn’t remove the inscription, write about it in the comments, we’ll sort it out.

Video

I immediately suggest a thematic video for those who do not want to read the article for a long time. But I assure you, if you can’t solve the problem this way, there will be other options below.

Unidentified network

The most common case. Your computer sees the network and tries to work with it. And he physically succeeds. But in a network exchange device there are several levels of interaction (read in Google OSI model 7 levels). So, if your computer does not receive an IP address, then this error will appear.

The “Identification” status may also hang for a long time before this - when your system is still trying to find out the correct IP.

Why didn't he get an IP address? Under ideal conditions, the router, using its DHCP server, distributes its own address to each connected device. But at some point a failure may occur and the correct addresses (standard – 192.168.x.x) will not be provided. And the computer will try to do this itself and return incorrect ones from the 169.254.x.x pool. Total - the computer and the router are physically connected (whether via an Ethernet cable or Wi-Fi), but are virtually located in different networks and don't see each other.

The reboot solution often helps in this case. Another option is to manually set your network settings so that you never have this problem. But if you suddenly don’t understand this at all, it’s better not to bother. There is a risk of doing something wrong.

For advanced users, I offer the following instructions.

Let's remember the IP address of our router. If you don’t know, look at it on the sticker at the bottom:

Through the “Network and Sharing Center...” (Windows 7) or “Network and Internet Settings” (Windows 10) we get into the adapter settings. Select your problematic adapter, right-click, “Properties”. And then as per the diagram:

A little decoding. My router at home has the address 192.168.0.1. We enter it in the gateway field. The mask is always the same for everyone. But you can try to make any IP address, but the third digit (0) should be the same as on the router. "Eights" - leave it as is, this DNS servers from Google, will come in handy. Total:

IP address: 192.168.0.127
Mask: 255.255.255.0
Gateway: 192.168.0.1
DNS: 8.8.8.8
Alternate DNS: 8.8.4.4

After saving, everything should literally work immediately. Try it. If it doesn't work, move on.

The “No network access” problem is treated in the same way.

Just without access to the Internet, the network is recognized

A slightly different case is when the network seems to be recognized and even the Internet can be on some applications like Skype. But the sites don't load at all. And the access type says “No access”. The solution is to add alternative DNS from the previous section. In this case, there is no need to change the basic settings. The output should look something like this:

Other options

Here I will list other options if the first cases still did not help, but it says that the network is not recognized. Most likely, something from this list will also help:

The problem is with the provider. Especially if the connection is not through a router, but directly. If you have any doubts, just call your Provider and ask for advice. It’s free and often really helps, but often this is the only way to find out about problems on the side (on personal experience with native Rostelecom). Especially if everything worked smoothly the day before.
Try to immediately separate the problem - does this happen on other devices or is everything normal there? If the problem is common, it means that either the provider or the router is to blame. If only on one computer, the problem is network settings, and they can be solved using the methods above.
Driver problem. Rare, but accurate. Literally several times throughout my working life I encountered the problem that there were no problems with the driver in the Device Manager, but the device was not working correctly. This is especially evident during auto-installation by the Windows driver itself. So if you have any doubts about the hardware, try reinstalling everything using the same DRP.su.
Same MAC address. Another possible case. Less common, but still worth mentioning. The fact is that manufacturers can issue the same MAC addresses to some of their devices on the stream. At the end of the day, 2 devices, by coincidence, can compete for a place in the sun. Total - one has a connection, the other does not have access to the network. Those in the know can safely check the current MACs on all their devices and think about changing them (Device Manager or Technitium MAC Address Changer to help).
DHCP server on the router - if possible, go to the settings of the router and check whether it works and whether the DHCP server we need is enabled there. It very rarely turns off.
My Internet sometimes disappears with this error for another interesting reason - there is a signal amplifier, and the laptop periodically reconnects from the router to it, choosing the best signal (relevant for wireless network connection). As a result, the Internet disappears for some time, this status falls out. But everything is decided literally in seconds.