I just installed the Parallels 5 upgrade on my Mac OS X 10.4.11/Mac Pro system. I tested the new Windows Aero support with Windows Vista without issue. However, when trying it with Windows 7, I cannot get Aero to work. When running the troubleshooter, I get get the following message: "Desktop window manager is disabled" The troubleshooter proceeds to tell me that it has fixed the problem and to try re-enabling Aero. This fails. I tried a hack to enable Aero here: http://www.mydigitallife.info/2009/01/13/hack-to-force-enable-aero-in-windows-7/ This fails as well. If anyone has any suggestions on this, I would be very grateful. Thank you in advance.