I have installed OEM MS Windows 7 x64 bit on two MacBook Pro and MacBook Air with and without OSX partition. They work fine, in fact I would not buy another kind of laptop. You must have the correct bootcamp on a USB drive so you can install the correct Windows drivers to get wireless and other features.. There is just one problem and it only occurs on one MacBook Air, my wife's of course. One of my MacBook Air installs fine and works fine but after a day or two it will not boot (black screen). I have discovered after much suffering that when I boot in safe mode and uninstall the Intel HD Graphics 4000 driver it reverts to MS Standard VGA driver and works fine thereafter, but you lose the Apple display features such as brightness control. Apart from this I find MacBook is a very stable MS Windows 7 platform and beautifully constructed hardware.