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WIFI 6 (Mediatek MT7921) disconnects randomly

I just finished building a new pc and installed all the appropriate drivers and software. I have a WIFI 6 router which I have had for a while now and never had any issues with and the motherboard I am using is the ASUS TUF GAMING B550-PLUS WIFI II AM4 AMD B550 SATA 6Gb/s ATX AMD Motherboard. It utilizes the Mediatek MT7921 WIFI card.

The WIFI will randomly disconnect but it says its still connected. Oddly enough I can still load Google and Youtube but nothing else and even then that is intermittent and extremely slow.

Drivers: Ive tried updating, rolling back, deleting and fresh install. no dice

Settings: Ive tried disabling IPV6, Changing from AX to AC to N, etc, Disabled the Bluetooth since its the same adapter. no dice.

Ive even checked to see on another device if my pc is connected to my router while its in this disconnected state and it shows that its connected to my router but it will not connect properly to the internet. I have not had this issue with any other device on my network so I am to conclude that it is most likely to do with this new pc and this Mediatek WIFI Adapter.

Any and all help is greatly appreciated.

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Hi RPanch407.
I'm David, and I'm happy to help you.

Have you installed the latest driver available from the Asus website?
The latest driver is "22.80.1.1", released on 2021/10/27.
Source: https://www.asus.com/Motherboards-Components/Mo...
If it wasn't that driver. I suggest you install it and see if it fixes the problem.

If this is the driver you have installed, reset the network settings as instructed below:
1. Open Start and select "Settings > Network & Internet > Status";
2. At the bottom of the page, click on "Network Reset";
3. Select "Reset Now", and at the confirmation screen, select "Yes";
Note: The PC will need to be restarted.

4. Now open Start and type cmd;
5. Right-click on "Command Prompt" in the result list and select "Run as administrator";
6. At the Command Prompt, type the following commands one at a time and press Enter:

netsh int ip reset
netsh winsock reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns

7. Restart your PC and see if the issue is resolved.

If it persists, I suggest you check if the motherboard BIOS is updated.
The latest version is "2604", released on 2022/03/07.
If it's not updated, I suggest you update following Asus' instructions.

I hope this helps. Feel free to ask back any questions.
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So I've updated to the latest driver, ran all of the commands like you recommended and updated to the latest bios and it is still disconnecting randomly.

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In this case, check the adapter power settings.
1. Press "Windows + X" and select "Device Manager";
2. Expand "Network adapters";
3. Right-click on the adapter and select "Properties";
4. Go to the "Power Management" tab
5. Uncheck the option "Allow the computer to turn off this device to save power";
6. Click Ok.
See if the issue is resolved.

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Thx but that was one of the first things I do on a desktop. all of my settings are for max performance.

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Thanks for the clarification.

Is your Wi-Fi set to Public or Private?
If it is set to Public, set it to Private and see if the issue will continue to occur.
https://support.microsoft.com/en-us/windows/mak...

If it persists, when the problem occurs, run the network troubleshooter.
1. Click the Start button;
2. Select "Settings > Network & Internet > Status";
3. Under "Advanced network settings", select "Network troubleshooter".
If any error messages are displayed, let me know.

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Its been set to private. I've also run the troubleshooter several times and it doesn't find any errors

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Thanks for the clarification.

Do you have any third-party security software (Antivirus/Firewall)?
If so, temporarily disable it and see if the problem stops occurring.

If it persists, perform a clean boot to see if any third-party program in the background is causing this problem. Follow the instructions carefully.
https://support.microsoft.com/en-us/topic/how-t...
If the problem does not occur after a clean boot. In this same article, there is a technique to help you identify which program is causing this in "How to determine what is causing the problem after you do a clean boot".

After finding the cause or if it does not help, return to normal boot as instructed in "Reset the computer to start normally after clean boot troubleshooting".

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I havent installed any 3rd party antivirus or firewall. I am only using the windows defender. I did a clean boot but the problem still persists. I double checked the driver for the WIFI adapter and found something interesting. When I run the network troubleshooter it shows i am using an old driver. but when I check in device manager it shows I have 3.3.0.479 installed.

Network adapter Wi-Fi 2 driver information:

   Description . . . . . . . . . . : MediaTek Wi-Fi 6 MT7921 Wireless LAN Card
   Manufacturer  . . . . . . . . . : MediaTek, Inc.
   Provider  . . . . . . . . . . . : MediaTek, Inc.
   Version   . . . . . . . . . . . : 3.0.1.1203
   Inf File Name . . . . . . . . . : C:\Windows\INF\oem29.inf
   Inf File Date . . . . . . . . . : Friday, September 17, 2021  6:31:28 AM
   Section Name  . . . . . . . . . : MTKWLAN_MODE2.ndi
   Hardware ID . . . . . . . . . . : pci\ven_14c3&dev_7961&subsys_46801a3b
   Instance Status Flags . . . . . : 0x180200a
   Device Manager Status Code  . . : 0
   IfType  . . . . . . . . . . . . : 71
   Physical Media Type . . . . . . : 9

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Do a clean install of the Wi-Fi driver as instructed below.

Before starting the procedure, make sure you have the latest Wi-Fi driver installer. If you have deleted it, download it again from the Asus website.

If you are also using the Ethernet (Cable) adapter, temporarily disconnect it during the entire procedure to prevent Windows from installing another driver automatically.

Uninstall the current driver:
1. Open "Device Manager" (Windows + X and select Device Manager);
2. Expand "Network adapters";
3. Right-click on the Wi-Fi adapter and select "Uninstall device";
4. On the confirmation screen, check "Delete the driver software for this device" and click "Ok";
5. Restart the PC.

After the PC restarts, install the driver you downloaded from Asus.

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just did that and the troubleshooter still shows the old driver but device manager shows the correct one.

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Last updated May 11, 2024 Views 92,395 Applies to: