content: It doesn't run the Windows GUI. There's a special version of Windows 10, "Internet of Things" or iOT.  There's a review Here  It's still in the early stages and doesn't do much. As far as the original question, The Raspberry Pi 2 has the largest community and the most stable Linux platform with Rasipbian.  The Banana PI is a clone of the Raspberry PI. It was quite a bit faster but with the Pi 2 I don't know if it has as big an advantage as it used to.  I haven't kept up with the Banana PI though so there may be a faster one that I don't know about. If you're just wanting a cheap Windows machine you'll have to look into one of the cheaper Windows 10 netbook type machines.  There are some in the $250 range.