If you have updated to WinXP Service Pack 3 and are experiencing problems with your UltraBay, Hotswap drive bays and/or external write blockers connected via Firewire or USB you will need to uninstall SP3. Many people are experiencing problems with Firewire and USB after an SP3 update. This is not limited to our systems, but any system running SP3 utilizing Firewire devices (our UltraBay and Hotswap Drive bays are Firewire-based). Please do not update to SP3 until Microsoft addresses these issues. If you already updated, it is preferable that you go back to a restore point before the update. You can also try the Add/Remove Programs option of your Control Panel to remove the SP3 update.