Marc - nice compatibility tests, thank you! For VSS error - I noticed it before, looks like VSS doesn't accept multiple programs creating snapshots at the same time. Luckily the snapshot creation only takes a few seconds, so the error probability is low. sukarof: I have no idea why it wouldn't accept a stick with files on it. We have no such limitations. Anyway, I'm glad it worked for you, and I'll try to reproduce this problem, thank you for letting me know.