How to suppress PC beeps

Go to Start, then type 'regedit' into run, or into the search form in Vista. Then go to HKEY_CURRENT_USER\Control Panel\Sound by clicking on the plus buttons next to the folders to enter that folder. In that folder should be a key called 'Beep'. Double click it, and change the value to be equal to no. Now, when you reboot your PC, all the beeps should be gone.