1. Mac OS Version - 10.5.2 2. Parallels Build # - 5600 3. What kind of computer - Macbook Air 4. Total Physical RAM - 2GB 5. Hard Drives - 1 SSD (10GB NTFS Partition) 6. If you are using a BootCamp configuration or not - Yes BootCamp 7. Did you upgrade from a BETA - No, Fresh (uninstall and reinstall) 8. With what Build did the problem start - 5600 9. Guest OS - Windows XP SP3 The problem is this... I run through the VM setup, tell it to use my bootcamp partition and everything works fine. Reboot into OSX, still works. Reboot into BootCamp, then back into OSX and I get this error. "Parallels Desktop is unable to operate properly since it cannot communicate with one of its drivers. ect..." If I delete the files inside of the Parallels folder in Documents and then reboot, it asks me to go through the setting up of the VM again and it works fine, until I boot into windows via bootcamp and back into OSX and run the VM. So basically when I boot natively into Windows then reboot into OSX and try to bring up the bootcamp partition via Parallels it doesn't work. This all started after SP3 and build 5600.