Hey guys, back again. The problem is pretty straightforward, right from the title. I have a 750G HD that shows up under the Device Manager, but not under Disk Management. It's in the Bios. But not in the Win7 OS. Honestly, I'm a little confused. What's worse, I uninstall it from the Device Manger, it reinstalls itself, and still wont show under Disk Management. Yes, all cables are installed correctly, I've tried multiple cables, different slots, and I've even tried shifting it around in the BIOS. And unfortunately, Googling "Missing Hard Drive under Windows 7" (or any other variant) leads to the same old topic of people missing their Vista or XP partition because it never assigned a drive letter. Huzzah. Does anyone else have this problem?