I read threads for hours in this and other forums, there are many related problems to mine. But never the same. Because the solution suggestions are not fitting to me. Here the chronic procedure: 1. I created a backup 1 month ago with the rescue-disk TIv 9.0 Build 2.337, saved on a external hdd. 2. After that, I tested the archive, test successful. 3. I installed another OS on the disk with different partitions 4. Now I need to undo it. I created a new archive of the current partitions, no probs. 5. I want to restore the old archive on the disk, and I got the Message that it is a not valid or corrupted archive. (I restored often archives with this version, in the same way) 6. Ok, I thought. I ran scandisk and chkdsk /f on the external drive. There was found and solved a bit-failure. 7. I still had the problem, so I searched on the internet for similar issues and found a lot. Here I must say, that I copied once the file to another disk and back, to format the external disk. Now I know that this is porpably the technical problem. Because the image is more sensible than I thought. 8. Ok, it had happened, my stupidity. I tried to open the file in Windows and in Rescue-Mode, I even tried the same with the newest TIH 9.0 version Build 3.694. But nothing helps. Until this line the problem seems quiet similar to others but the worst about my problem is, that I cannot redo the backup of my first system I mentioned. But the files in the image are very important, among other things like very important documents for my exam. At least I need to read the image to copy the important files to another disk. Thanks.