Tried deleting my original thread due to so many edits. I just had to make a new one with a proper title. I'm finding that True Image 10 Home files work fine (creating, exploring and mounting in WinXP) when created on an external USB drive. They continue to work fine when placed on the desktop of a different computer (running Vista), but then seem to get corrupted when burning to DVD using Nero or Vista's own built-in DVD burning function. The corruption manifests itself as the Mount function complaining that the file is corrupted or the Explore function suddenly asking for a password (when none was used to create the files.) The files were split by TrueImage so that they'd fit on DVD's. I happen to be using DVD-R's, although I have some +R's, too. I've burned at 8x and 3x (Nero and Vista speeds) with no change. The discs from Nero pass validation after burning. What on earth is happening? I can't just leave them on a USB hard drive.