When I try to delete something (or some other operations) in Vista, always some kind of a admin permission request occurs. How can i cancel this question? I just want to click on the delete and delete like it is in XP.

A computer was given to me by a friend and they forgot the administrative password. We have tried pressing f8 to nget int safe mode but that isn’t working. Now we are trying to reinstall the windows xp. How would we go about doing so?