Ano da, predpokladam ze tam kde si to zapol. Skus http://www.abilitynet.org.uk/raps/docs/Windows_Vist a_-_Tuning_the_Keyboard.pdf, strana 3, "play a sound when keys are pressed". Alebo si prehladaj vsetky nastavenia klavesnice a najdi kde to je zaskrtnute.
Mohlo by sa to dat aj v registry, http://www.arsgeek.com/?p=1190 sekcia "Turning Off the System Beep". Ak nevies anglicky tak to nerob.