Reboot. The board will load default in-box Microsoft drivers, bypassing the problematic Intel drivers that triggered the POST error.
The string is not a specific model name, but rather a sequence of regulatory and manufacturing marks commonly found on legacy Intel motherboards, particularly the Intel LGA 1155 socket series supporting 2nd and 3rd Generation Core processors. intel desktop board 21 b6 e1 e2 driver work
Because "21-B6-E1-E2" is a generic marking, you should use the Intel® Product Identification Tool or check the System Information Reboot
bcdedit /set default safeboot minimal bcdedit /set default safeboot network bcdedit /deletevalue default safeboot intel desktop board 21 b6 e1 e2 driver work