There are two things i've found that work for XP passwords. Three really but the last one is very complicated. First you can try to do a system restore if your brand of PC allows for it during startup. Restore with files intact and it will just reset your OS to factory defaults and save all program and data files. All users will be reset. The second is to restart and come up in safe mode. Logon as administrator and reset your user account. Restart and as will be well.
