I have been running dual boot OSX and windows labs in a University for a few years now so have plenty of experience with it, however today I am seeing something that I have never seen before. I have iMac's running OSX Lion and Windows 7 64bit Enterprise, they are both joined to the same windows domain controller. Lion seems to work as Leopard and Snow Leopard did and I have no problems. However with Windows 7, after the iMac's are turned on and boot in to windows they sit at the log in screen, if no one uses the computer at all and it's just idle after around 30 minutes the iMac reboots. Has anyone seen this happen or is there some sort of power setting I am missing in 7 that is causing this to happen? Would it happen if the time in Windows is out of sync with the domain controller by more than 15 minutes? Thanks in advance for any help at all!