@echo off
:: ask permission from administrator
net session >nul 2>&1
if %errorLevel% neq 0 (
    powershell -Command "Start-Process '%~f0' -Verb runAs"
    exit
)

:: run after permission 
reg add "HKCU\Software\Microsoft\Print\UnifiedPrintDialog" /v "PreferLegacyPrintDialog" /d 1 /t REG_DWORD /f

echo Done!
pause