If you get a program called you can make that bootable off a floppy.
You can use that to reset the Admin password, allowing you to log in as Administrator. From there, you have complete control over the system, you can modify accounts and reset passwords for any other accounts that may have appeared on the system for some reason.
Hope that helped!
Seti says> You don't tell people how to get past security, please. If he doesn't have at least one of the passwords let him take his system to a shop. But here you don't know if he's a hacker or legit.
Master of common sense. If you don't like it, stop reading.