i'm having trouble deleting accounts in the program files/users file. this was a second hand computer with vista on it. i also can't make it stop asking me for permission to make changes. i've turned off UAC to no avail. i downloaded the "take ownership" thing for right clicking...took ownership and still can't delete it. i also unlocked the hidden administrator account like you said. these accounts that i want to delete don't show up when i turn on the computer. one of them is for the guy who had the computer first.