Originally Posted by Bahawolf
We have a nifty utility at Geek Squad that removes passwords for us.. ;-)
I can't release much information on it (policy) but I'm sure you can find a similar utility.
I know there is a site that allows you to boot off a floppy, and it writes the registry hives to the floppy.. then decrypts the password for you.
Emergency Boot CD Pro from http://www.ebcd.pcministry.com/
also resets windows passwords. Make sure to read what it says, as if you dont it won't save the changes
Also windows passwords cannot be simply decrypted, they need to be cracked. You could fit a brute force program on a floppy disc (possibly), but you couldnt get a true fast cracking program on a floppy disc.
The most common way to crack just about any windows password is thru "Rainbow tables" using a program such as rainbowcrack or ophcrack. Both require HUGE tables, I got 70GB of tables dedicated to cracking windows passwords personally.