I installed the FDISR Beta in Windows XP, created a new empty snapshot and then installed Vista in the empty snapshot. It installed fine, I got to the desktop, installed FDISR Beta and then rebooted and it booted back to Vista, a little later I rebooted and switched over to the Windows XP snapshot. It booted and worked fine, but then when I rebooted to switch back to Vista, I kept getting Missing NTLDR message and could only boot windows xp and not Vista. Does anyone have any ideas? Thanks in advance.