find orphaned windows users

Clean-OrphanedProfiles.ps1

# Notes. -- Some useful windows commands I used recently
# shutdown no hibernate:  `shutdown /s /t 0`
# turn off hibernate:  `powercfg /h off`
# User profile info:  `Get-CimInstance Win32_UserProfile | Select-Object LocalPath, SID, Loaded, Special`
# Allow powershell script execution:  `Set-ExecutionPolicy -Scope Process RemoteSigned`


# Get all local users (to match SIDs)
$localUsers = Get-LocalUser | Select-Object Name, SID

Write-Host "`n=== Orphaned Profile Cleanup ===`n"

# Enumerate all user profiles
Get-CimInstance Win32_UserProfile | ForEach-Object {

    $path    = $_.LocalPath
    $sid     = $_.SID
    $special = $_.Special
    $loaded  = $_.Loaded

    # Skip system, special, or currently loaded
    if ($special -or $loaded) {
        Write-Host "$path --> SKIPPED (special or in use)" -ForegroundColor Cyan
        return
    }

    # Check if there's a matching local user account
    $user = $localUsers | Where-Object { $_.SID -eq $sid }

    if (-not $user) {
        # Orphaned profile
        Write-Host "`nORPHANED profile found:`n  Path: $path`n  SID:  $sid" -ForegroundColor Yellow
        $choice = Read-Host "Delete this profile? (Y/N)"
        if ($choice -match '^(Y|y)$') {
            try {
                $_ | Remove-CimInstance
                Write-Host "Deleted: $path" -ForegroundColor Green
            }
            catch {
                Write-Host "Error deleting $path : $_" -ForegroundColor Red
            }
        }
        else {
            Write-Host "Skipped: $path" -ForegroundColor DarkGray
        }
    }
    else {
        # Active profile
        Write-Host "$path --> ACTIVE (belongs to $($user.Name))" -ForegroundColor Green
    }
}

cleaning up accounts on a donated surface that is being dual booted. want the windows partition to be as small as possible. currently 30% of the drive space is orphaned profiles.