Acronis TI10, E2660, 2Gb, Asus p5b, Gt 8500, Sata 400 (50GB for Vista HB, 2 other partitions), Sata 80 (XP Pro), Ext 320,USB HD. My operating systems and applications are all installed so I want to make a backup of both OSs to my external HD. Do I need to be booted into the relevant OS to make a backup or is it possible to do it from just one. Acronis sees the other HD and folders? It's easy enough to boot to, say XP, and run Acronis from there and vice versa. If I need to do a Restore, will I have to re-activate with Microsoft, or will all the original activation details remain the same and re-activation be no longer required?