I recently received a 640 GB WD hard drive (Caviar Black) and installed it in my computer. Everything seems to work great (a nice upgrade from my 160 GB seagate), except the fact that it only shows up in Windows as 598 GB. I would expect there to be a little bit of lost space just the way the drive was formatted, but 42 GB? Has anyone else seen this type of problem? Is there a way I can get Windows to recognize this extra space?