If have forgotten your user account password then try the method listed below to get inside your pc!
Start system and when you see Windows Welcome screen / Login screen, press Ctrl + Alt + Dlt keys twice and it'll show Classic Login box. Now type "Administrator" (without quotes) in Username and leave Password field blank. Now press Enter and you should be able to log in Windows.
Now you can reset your account password from "Control Panel -> User Accounts".
Same thing can be done using Safe Mode. In Safe Mode Windows will show this in-built Administrator account in Login screen.
Works in Windows Xp!
