How to Disable Windows XP Startup Sound in a Creative Sound Card
- 1). Click the "Start" button to open the main menu. Click "Run" and type "mmsys.cpl", then click "OK" to open the sounds configuration panel.
- 2). Click the "Sounds" tab to access the Windows sounds options. Locate the option labeled "Play Windows Startup Sound." Click the box to remove the check from the "Play Windows Startup Sound" option.
- 3). Click the "OK" button to save your changes. Restart your computer to verify the startup sound is disabled.
Source...