Hello guys, I dunno if this is old news or someone has posted it, but as far as I know 64-bit Windows currently only works on the MacBook Pros and the Mac Pros. iMac is unsupported. But somehow I got it to work - I popped in the Windows 7 DVD and got it installed. It installed, and Windows was loaded. Then I got the problem: When I tried to install the drivers from the Mac DVD, it refused and said the driver was unable to install on this system or something like that. So a simple workaround was to go into the disc itself - browse - then open up a series of folders. Then you reach an install icon for x64. Double click on that - and it ran without a problem. Everything was installed. I made sure I went into all other subfolders and installed everything x64. So now I have Windows 7, 64-bits running on my iMac! The only problem I've noticed is that the keyboard's shortcut keys won't work - like the volume and the eject button - but that's no big deal since there's workarounds, and besides, I don't use Windows that often. Only for some of my engineering-related programmes that only run on MS fuel. Other problems are some arbitrary software that aren't compatible with Windows 7 x64 - that's MS's problem, not my iMac. Below are 2 screenshots... one running natively in Windows, and another using Parallels Desktop. You can see full 4GB of RAM utilised when it is booted in Windows, and 1GB allocated in virtual mode. P.S. Aero doesn't work under Parallels Desktop because the graphics card is called "Parallels Video Adaptor", which is not recognised by Windows So ya enjoy x64 Windows 7 on your non-Pro Macs!