Google for lost Windows password. Short of reinstalling the OS, this should give you some possibilities.
The Emergency Boot CD can do this.
I was given an HP pc from work the other day as they were disposing of it and it was originally was connected to our network, and to log on you had to press ctrl, alt and del then enter your username and password. Now, at home i want it as normal pc. I dont know the username and password to log in. How can i log in to it.
I have tried Safe Mode, but it still requires ctrl, alt and del and a username and password. I have pressed ctrl, alt and del twice but nothing.
It is running Win XP pro.