I have just upgraded to Build No. 3567. In the previous build I was getting intermittent failed backup attempts due to the inability to create a snapshot. Now I get that, preceded by a message that the drive is in use and cannot be accessed. So the backup didn't even start. This was on selection of the backup drive option, as against specific files and folders. I then tried the other (files) option. The backup started, but was punctuated with a whole series of messages about individual files being in use. These files weren't related to other applications; they appeared to be Windows files (XP Pro). I take it that the snapshot couldn't be made because the program was having trouble with these 'inaccessible files'. As someone suggested in another thread, I resorted to backing up from a CD boot and that worked fine. It's all very well to do it from CD but that doesn't change the fact that at least for me, the program is not fully functional and scheduled backups from within Windows cannot be guaranteed to work. The main reason I switched from Norton Ghost was because of the latter's insistence in working from a bootable disk and the fact that it couldn't be scheduled. Is there ever going to be a resolution of the snapshot/file-in-use issue, or have I overlooked something?