# Last update: 2026-09-26T18:01:35Z UTC

Clear-Host
Write-Host -ForegroundColor Darkgray "localonly.win"

Write-Host "* Press CTRL+C or ALT+F4 to abort"
Write-Host "* Windows will ask to change the default (empty) password before first login"
Write-Host "* User name can't contain these characters: / \ [ ] : | < > + = ; , ? * % `"`n"

:l while ($true){
    $UserName = Read-Host "Who's going to use this PC ? (leave empty to use 'Admin') "
    if ( ($UserName -notmatch '\/|\\|\[|\]|\:|\||\<|\>|\+|\=|\;|\,|\?|\*|\%|"') `
        -and ($UserName -notmatch "^\s+$") ) {
        break l
    }
}

if ([string]::IsNullOrEmpty($UserName)){ $UserName = "Admin" }

Write-Host "Creating user `"$UserName`""

$XLMURL = "https://localonly.win/unattend.xml"
$XMLPath = "$env:windir\Panther\unattend.xml"

try {
    Invoke-WebRequest -Uri "$XLMURL" -OutFile "$XMLPath"
} catch {
    Write-Host -ForegroundColor Red "ERROR: cannot get $XLMURL. Aborting"
    exit 1
}

try {
    (Get-Content "$XMLPath").Replace('@USERNAME@', "$UserName") | Set-Content "$XMLPath"
} catch {
    Write-Host -ForegroundColor Red "ERROR: cannot edit `"$XMLPath`". Aborting"
    Remove-Item -Path "$XMLPath" -Force 
    exit 1
}

Write-Host "Machine is going to reboot. Please wait..."
Start-Process -FilePath "$env:windir\System32\Sysprep\Sysprep.exe" -ArgumentList "/oobe /unattend:$XMLPath /reboot"