Was Happenin yall!?

Hey everyone! My name is Tim, and I just registered here. Ill do my best to be a good member and help out with whatever I can, as long you you guys, and girls, can help me out. I am currently a sophmore(12th) at Mt.Lebannon HS and im taking a Honors computer programming - C++ course.
I have a problem with my Laptop that hopefully somebody here can help me fix. I cannot log onto Windows(2000) because I believe my password was changed on me. Not to mention I do not know/remember the passwords to my other Administrative accounts. Any help whatsoever on this matter would be greatly appreciated.
Thank you for your time.