I have run Win 7 in 32-Bit edition on my MacMini Server 2011 (8GB Ram) on Parallels 7 to date with no problems. But I installed the 64-Bit version on Parallels 7 a few days ago and have started using it instead but I notice the Windows screen then it is minimised (not full screen) like an OSX window starts to pixelate and flicker after a few minutes to a few hours. If I click the Start button in Windows the Windows screen clears and it is ok. I am wondering if it is a graphics issue? My monitor is a Sony Bravia TV so it is clearly capable. I never had this prob with 32-Bit and it doesn't happen on 64-Bit edition on my MacBook Air 2011 and Mac Mini 2011 (non-server) so it seems to be a MM Server Prob. I know you might say it is the MM Server GPU as it is non-dedicated etc but it never happened with 32-Bit. Also the MB Air has an Intel HD Graphics 3000 384 MB while the MM Server has the same Intel HD Graphics 300 with 512 MB. So I am not certain it is the GPU. I think is is something to do with Parallels Also it happens with Screen Share as well. Anyone experience problems with Win 7 64-Bit on Parallels 7? More specifically with graphics problems? Silver.