Hey guys I'm new here.
Today I fell into a trap after updating my bios to PRIME B450M-A BIOS 4202 (prev. bios version from 2019 or 2020)
After the bios updated it was not possible to start the windows 10 normally and only Safe Mode works.
Error was caused by NVIDIA graphics drivers. Solved after removing the drivers under safe mode.
PS: Pls, escalate this to the appropriate department. People should be aware that Asus Prime Bios updates can cause such errors like Clock Watchdog timeout I found.
So, before updating BIOS make sure to set all bios settings to default, AND REMOVE the graphic drivers under safe mode!