My son just went through a reinstall of Windows XP. His hard drive has two NTFS partitions, C: and D:. He deleted an unwanted user id, and mistakenly replied "NO" to a question "should that user's files be kept?" or something to that effect. Now the D: partition still exists, but it is "full" and, when he tries to go to it, "inaccessible." Is there a way to make the partition accessible again? He has data there that he does not want to lose.