You can reset the password if you have another machine you can access and burn a boot CD to reset the password on your machine:
http://www.pchell.com/support/forgotadministratorpassword.shtml
I've used this on Win NT, 2000 and XP, HOWEVER, did have a problem once with Promise SATA RAID controller -- it wouldn't recognize this hd controller.
Good luck!
brucemoreg
April 2007