I have never heard of this before. I have two 40gb drives in my box. I had to clean and re-install the OS (and everything else) due to a virus I didn't catch in time. I know the drive is there. Prior to the re-install I saw it listed as "unformatted"??? But now that I have installed WinXP - The drive dissapeard and no longer shows up on any screen I can pull up???? I also saw it during the installation as a choice to install to...DOES ANYBODY HAVE A CLUE AS TO HOW TO GET THIS DRIVE DETECTED AND FORMATTED???