Linux is great for when windows gets it's head stuck up it's ass. Just be fucking careful with linux NTFS write support, it is most definatly not yet safe to use. The linux pased NTFS password resetter is at
http://home.eunet.no/~pnordahl/ntpasswd/bootdisk.html , I've used it on a few servers at work. It does work, but CAN hose your filesystem, so don't use it unless your only other option is reinstalling windows.