Free = NTPASSWD
Use google to find it. It's free, boot the CD and answer a question and clear the password.
Another Free that works = BOOT SAFE MODE and login as administrator.
Use google if you forget how to boot safe mode.
Need support? Head to http://www.lostpassword.com
Was given a computer after my uncle passed away .. have restore disks etc. but no password information. Machine starts boots windows XP but thats as far as I can get with a password. I do not have a windows disk. Should I try the restore disks? Are there other options? Thanks in advance!