I have XP Pro as a VirtualBox guest in a Ubuntu 10.4 host. I launched VirtualBox XP into primary snapshot as usual - all was fine. I then elected to boot into the secondary snapshot. The virtual XP closed down as usual and then entered the First Defence boot screen as expected, unfortunately it won't move from there. As you know, as it's a pre-elected snapshot (by that I mean while in Primary snapshot, I already told First Defence what I wanted), there is no f1 option that would allow me to return to the primary snapshot. At one point I did see a Cache Full error message. I haven't seen it since, nor do I know what it means. Is that game over for this VM, or is there a way back/forward from here?