1. Open command prompt with admin permission
2. Execute these commands then restart the computer
RD /S /Q "%WinDir%\System32\GroupPolicy"
RD /S /Q "%WinDir%\System32\GroupPolicyUsers"
gpupdate.exe /force
I'm leaving this here for now just for reference. Forget installing Mint on old hardware. Installing Linux On Old PC - Avoiding UEFI Why...