Just a heads up to let people know that it is possible. Sure, the system is using a lot of swap, but it works fine. I gave windows 850MB ram and it seems to be happy with it, OSX still runs fine as well, with chrome, preview, excel and word all open with multiple tabs/documents. Obviously, if you are going to be doing any heavy work and are planning on using both simultaneously, you should probably get the 4GB ram, but if you just want windows to run the odd app here and there then don't hesitate to try it out. I decided to try it after realizing that windows 7 worked just fine on netbooks with 1GB ram, so I saw no reason why it wouldn't be just fine on here for basic tasks.