|Removing the Upper and/or Lower Filters may help. Make sure you remove the right key(s), here http://support.microsoft.com/kb/314...|
If the Filter key(s) do not exist then it is a different problem. If after removing the Upper and/or Lower Filters, the drive does not show up in Device Manager, restart the computer and check the POST screen during start-up or go into the BIOS set-up to see if the drive shows there. If it doesn't show in either, then the drive is probably defective and needs replacement.