Even minor repairs become a full re-install of the XP OS without that password. On top of this, I've seen such leave with the XP CD-KEYS too!

1. Do you have your CD-KEY?
2. Are you willing to:
a. Pay up at http://www.lostpassword.com ?
b. Start over?

Bob

PS. There are some free approaches to this issue, but I can't write about such since they are unreliable and can damage the OS further resulting in some upset people. So I'll leave it to others to share those.