if it is running windows xp then when it is bootting up keep pressins f8 then it will come up with a screen with a few options choose safe mode then just agree with everything it does and it will make a new profile called administra then log in on that. the profile will look like the old windows then just go on to control panel > accounts > (your account) > remove password > then shut down and this will take it out of safe mode and delete the account that was made in the prosses hope this helps (it may work on other softwares but im not sure i do know it works on the windows xp software)

If you lost windows password, you can go into safe mode (F8 when booting up) to recover windows password, but you forgot administrator password, that way doesn't work. you must use software to recover administrator password. This method is very easy.