I installed a 80gb IDE hard drive into my other computer to access data on it and Disk Management lists the drive as "Disk 0" but will not let me assign it a drive letter or explore the drive for data. When you right click the drive it has the "Explore" choice grayed out. The only choice is to "Delete Partition...". On the disk right click choices all you have is "Convert to dynamic disk" and nothing else. The disk is the system and boot disk (I believe that is has a single NTFS partition for the entire drive space) from another PC that I don't need anymore and it has an installation of XP Professional 32-bit on it and the PC that I installed it too is XP Professional also but it is 64-bit OS. I tried a few commands in the command line utility DISKPART but none of those helped me either. I have installed foreign disks in XP many times in the past and have never seen this. Oh, also tried "Rescan Disks" from the Action menu and still no go. Any Ideas?