OK, first I'm no tech.  I am a "hit that button and see what happens" kind of tech. ;)  But if the beeping continues, I'd check the keyboard.  If a key is stuck, that will cause a beeping too.  If you are still having a problem, try a different key board.  ;) 

If it's a software problem, one can always reinstall everything.  If hardware, and not the keyboard, then I dunno. 

If all else fails, there's always the 9-stories solution.

Take the computer up to the 9th floor, open the window, and throw it out.

;)