After software update, I am not able to login to the laptop

Hi, I have this frustrating problem after upgrading to Windows 11 (via Windows 11 Upgrade Assistant). After boot up or screen lock, it takes me about an hour to able to input my PIN to login or unlock my notebook. I can not use Ctrl Alt Del or enter Task Manager by any means (note that I was not logged on if the PC just booted up). I have tried to reinstall Windows 11 via Reset PC (keep personal files) but the problem won't go away.
Does anybody have the same problem? How do you fix it? I really don't want to go back to Windows 10.

Thanks,