$drives = & wmic volume get "DriveLetter,Label";
$drive = $($($drives | Select-String -Pattern "winiso") -split "\s+")[0];

Write-Warning "Attention: This program will completely wipe your current disk #1 and install Windows on it. Are you sure you want to do this?"
Read-Host -Prompt "Hit enter to continue or CTRL+C to abort"
& "$drive\setup.exe";