WIFI 6 (Mediatek MT7921) disconnects randomly

Are you able to check if plugging in an ethernet cable works fine?

But also, I don't know if there's logs on Windows but EventViewer might show something to go on. It could be possible that the router log might also show what the issue is.

Routers are quite complex so unless you try a different router for wifi I wouldn't rule out a bug here from the router. They do have bugs and other issues.

Also you can test other connection types from changing how it works on the router from its browser interface like quickly trying no wifi security, different encryption/security, etc. Some incompatibilities exist that way. There's no way to know exactly how issues will manifest.

Mediatek drivers are quite decent from what I know with the chips I use from them. This is Windows 10 so I'd expect it to be quite stable. But, I'm sure someone could run into a bug. Maybe update the BIOS if you haven't as that's tied to the internal hardware.

Also possible for it to be Windows networking code. Some people have weird configurations with problems. But, I'd expect something else instead of this.

I had the same issue as yours with my newly purchased Asus ROG Strix G15 (2021 Model).

I can confirm that @jeremyb777's solution worked like a charm for me. I did the following steps:

1. Download the "MediaTek-FORCED-10x64-7961_3.00.01.1309_lenovo-drp" from this website(DRP is a great archive of device drivers)
2. Unpack the ZIP archive. Press WIN KEY + X, then hit "Device Manager"
3. Under network adapters, right click Mediatek MT7921 & hit "Uninstall device", then check driver uninstall confirmation in the next dialog box.
4. Restart your pc, open device manager again, right click Mediatek MT7921 under Network Adapters and hit "Update Drivers"
5. Click the browse option in the next prompt and select the drivers you downloaded (and unarchived) in the first step, then wait for it to finish the installation (you should get a success prompt).

This should fine for you too, if you have a similar configuration laptop. I have Windows 11 Home installed (with latest patches).

I am glad that it worked for you. This really is strange that the device drivers that are being provided with this seem to be defective. I've never had a problem like this before in my life. Since I installed the lenovo driver that I mentioned, I have only had to run the windows troubleshooter to reset the device 1-2 times as compared to about 10 times a day with the other driver. I'm pretty convinced that the drivers that were provided were bad. The Lenovo one might not be perfect, but had made a huge improvement. I'm hoping to find a future driver that will iron out all of the bugs.

My laptop ASUS FA506QM5900 also uses this WIFI card and met the same problem recently. I updated the latest driver (version 3.0.1.1309) from support.lenovo.com. It seems working well.

Dear Jeremyb777, thank you for your advice. I have Lenovo Ideapad gaming Ryzen7 which has mediatek MT7921 wifi card. If I hadn't read your advice, I would have taken my laptop back to the store, to get another one. Thank you so much, and all best wishes to you. Appreciate your solution.