I have a full backup I made and verified yesterday. I copied it to my external HD and verified it there as well. Today my virus program identified a possible virus threat to a file that was being downloaded to my cache, so I decided to restore that backup just to make sure I didn't have any trace of a virus left. I selected the archive, checked the C: partition and an error dialog box popped up with the following heading: "MFT Bitmap Corrupted" I didn't jot down the rest of the dialog contents. I also tried the restore from the image on the USB drive with the same error. Note... both times I was allowed to continue with the restore, and they both seemed to restore successfully. I thought the virus must have done something really bad to my system, so I ran chkdsk and have it automatically fix any errors, but it didn't show any errors. Finally I decided to try and restore the backup just previous to the one that gave the error, and it restored just fine with no errors at all. I deleted the backup that gave me the errors, and my system is working just fine. I guess the moral of this story is even though a backup passes the validation, does not necessarily mean the backup is without errors. So I think the only way to make sure a backup is good is to actually try and restore it. Does anyone have any other thoughts on this?