I can't quite recall where I lifted this info from exactly - some tech site someplace... But all in all its good, solid advice for Windows XP:

1. Disable all sounds in windows - To disable all Windows XP task sounds go to Start, Control Panel, Sounds and Audio Devices, select the "Sounds" Tab, under "Sound Scheme" select "No Sounds".

2. Disable auto load for all devices (CD-ROM/DVD Drives/CD/DVD-RW drives, etc.). Right click on each drive and select “Properties”. Select the Autoplay tab. For each Content Type, click “Select an Action to Perform” and choose “Take No Action”.