Windows 10: Why has my Windows 11 suddenly deactivated itself and troubleshooting does not work?

I've had my PC for over 1 year and a few days ago my Windows 11 suddenly deactivated itself and displays the water mark to Activate Windows. When I go into the settings to trouble shoot it tells me "we weren't able to activate Windows on this device and asks me to purchase a genuine copy of Windows. I'm getting an error code 0x803FA067 or if I go and change product key and put in the key installed on my computer it shows error 0x803fa067I purchased my windows 11 from a proper PC store.I've ran all the command prompts found online such as slmgr /dlv and these other methods I found in the forum:

:)

 

windows 11 deactivated suddenly

My windows 11 pro is deactivated suddenly and I am having trouble using apps on my pc. when i bought the device it had windows 10 running on it and it worked fine. This device came to me as a second hand product through a third party so I don't have any box or license attached with it. after buying the pc i moved to windows 11 from windows 10.At first I used to get notifications of "your windows license will expire soon, activate the windows" although the system always showed the active status whenever I checked, to get rid of this notification I followed a tutorial from internet here is the link for that "" but it didn't worked and now after one or two months later my windows got deactivated and when I activate or troubleshoot it shows error. I am mentioning the error code here "0xC004F074".

 

Windows 10 infinite restart black screen


The tutorials provided are just a list of troubleshooting steps. Use only the steps which apply to you.

Since none of the troubleshooting steps here worked, I'd suggest you do a Clean install.

John

 

MSFT acknowledges some Win10 Pro licenses being mistakenly deactivated

Source: Microsoft acknowledges some Windows 10 Pro licenses being mistakenly deactivated - Neowin

More:

• Windows 10 Pro goes Home as Microsoft fires up downgrade server - The Register
• Windows suddenly deactivated - Microsoft Community
• Windows 10 activation bug baffles, angers users | ZDNet

UPDATE: You can now run the Windows Activation troubleshooter to activate again.

*Arrow Use Activation Troubleshooter in Windows 10 | Windows 10 Tutorials