I never had this problem on my old computer, but have seen it before. When I play a game like flash flash revolution and am holding/pressing 3 or 4 directional keys at the same time I get a beep from my tower. Also, when I play Counter-strike and am holding say 2 keys (Duck, move forward) I cannot reload (r) without letting go of the duck or stopping to move. Any ideas on how to remedy the problem? Thank You.