Updating your motherboard's BIOS should not affect your Windows 11 activation, as activation is tied to your Microsoft account, not your hardware. However, it's possible that something went wrong during the BIOS update that caused your Windows 11 activation to be lost.
To resolve the issue, you can try the following:
Check that you're signed in to Windows 11 with the same Microsoft account you used to activate it.
Go to Settings > Update & Security > Activation and click on "Troubleshoot" to run the activation troubleshooter. Follow the on-screen instructions and select "I recently changed hardware on this device" when prompted.
If the troubleshooter doesn't work, try using the "Change product key" option in the Activation settings to manually enter your product key. You can find your product key on the Windows 11 packaging or in the email from Microsoft when you purchased the license.
Let me know if you need further help.
i searched and it seems many people have a same problem !!
i checked my microsft account and its fine , tried troubleshooting and " change hardware " but it not working and getting me error !
i don't have a product key because it is digital license from upgraded windows 8 to windows 10 during " free upgrade to windows 10 " many years ago