The traditional way to solve this problem is reinstall Windows Vista or restore it to factory settings. As we all know, Windows computer has no password required to login default. But the disadvantage of these traditional ways is data loss probably.Here I introduce another effective way for you. It can guarantee computer safety and high affection. Windows Password Recovery Tool 3.0 works like that.
Follow this video , learn to use it to byapss HP Compaq Vista admin password.