virtualbox.org

Hi,
I installed some programms on my linux mint guest system and after a reboot the maschine is completly empty! All my programms are away (also not hidden).
What could be the reason for it? I saved the settings before closing!
And can I finde my files my old maschine anywhere?

You either didn't install it (LiveDVD mode), you forgot to eject the LiveDVD and you rebooted from that, or you restored to a previous snapshot.