I'm running Parallels Desktop 2.2 (but this happened on previous versions), and whenever parallels is running and a run up CPU usage, the machine reboots. When it starts up again, I get a previous shutdown case of either 3 or -60. I also get this in the log at startup: Sep 24 08:15:12 MacBookPro kernel[0]: Parallels Workstation VMM Main driver started. Sep 24 08:15:12 MacBookPro kernel[0]: SpeedIt Kext is loading! Sep 24 08:15:12 MacBookPro kernel[0]: Supported states Sep 24 08:15:13 MacBookPro kernel[0]: com_parallels_kext_Pvsvnic: Ethernet address 00:01:23:45:67:89 Sep 24 08:15:14 MacBookPro configd[37]: target=enable-network: disabled Sep 24 08:15:14 MacBookPro SystemStarter[46]: Parallels VirtualMachine drivers (87) did not complete successfully Sep 24 08:15:54 MacBookPro diskarbitrationd[39]: disk0s3 msdos 00000000-0000-0000-0000-000000000000 NO NAME /Volumes/NO NAME Sep 24 08:15:58 MacBookPro SystemStarter[46]: The following StartupItems failed to properly start: Sep 24 08:15:58 MacBookPro SystemStarter[46]: /Library/StartupItems/Parallels Sep 24 08:15:58 MacBookPro SystemStarter[46]: - execution of Startup script failed I've tried reinstalling, including removing the driver, but I always get the same result. Any ideas? Thanks, Ken