All, I'm running 64-bit Windows 7 Professional Edition as my guest OS under Parallels Desktop 6.0.12094 on Mac OS X 10.6.8. The Macintosh has 12 GB RAM. The guest is allocated 4 GB. I have a dual display set up. I run Parallels in Coherence mode all day. My problem is that about half the time when I reboot the guest, it crashes on reboot and I have to go through "System Repair" to get it to boot again. Anyone seen this kind of problem before? Any advice? Thanks in advance!