Run PowerShell as Admin
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope Process
iex ((New-Object System.Net.WebClient).DownloadString('https://github.com/pbatard/Fido/raw/master/Fido.ps1'))
I'm leaving this here for now just for reference. Forget installing Mint on old hardware. Installing Linux On Old PC - Avoiding UEFI Why...