XP PAssword Recovery

I have been out of the country for several months, came back to find my housesitter has changed my password on my laptop (it prompted her and she must have misspelled etc) and I have no record of it, multiple possible combinations are not working. Help! I do not have a password recovery disk as the XP support suggests making.
Tech support through my University says yes it can be taken care of but it's complicated and therefore they are told to redirect people to XP tech support...Any thoughts?

 

Offline password editor here:

http://home.eunet.no/~pnordahl/ntpasswd/
This worked for me.

Also the following page has been posted here before and may be helpful.

http://www.petri.co.il/forgot_administrator_password.htm

 

The offline password editor worked with no problems. Thank you for your help.