Does the Raspberry Pi work with Windows? – Your tech questions answered
If you require a Windows computer, however (for example, if its primary use is going to be office tasks with some light programming), it's hard to recommend anything close to that price point. This is because Windows is a much more bloated operating system and requires higher system specifications to operate and run well. You also have to be careful that you aren't buying a Windows RT device, as you won't be able to run your own code without some more setup and, even then, you'll be limited to which languages you can write.