Don't know what OS you're using but here's a link for XP.

http://www.windowspasswordsrecovery.com/bypass-xp-password-in-safe-mode.htm

If not XP, check around the net. Many Hacks for many OS's.

It Don't mean a thing if it aint got that swing.

Cool, Free, Johnny Smith courtesy of NPR..HERE
http://www.npr.org/ramfiles/asc/asc25.smith.asx