well, i've got a custom built computer from a cousion of mine,
it runs windows XP, and the admin account is under her name but she forgot the pass as well, i am not able to do nothing over the guest account, i have No CD or anything to reboot it with, is there a way to crack the admin pass or reboot the whole system, because I have to put on anti-virus, and theres a whole lot of junk on this computer,

thanks alot
-Tip

there is one way,but it'll only work if she haven't disabled or put a password for admin account which is default in XP.Reboot ur system under safe mode & u'll see one more account with name Administrator.Log in to this account & u can now manage another accounts easily.
Hope it helps...^_^