This tutorial shows you how to use an original Xbox controller (whether official or unofficial model) with Windows 10, both 32-bit and 64-bit editions, thanks to a program called XBCD. This fully supports the Anniversary Update and will not harm or damage your computer in any way, should you follow the tutorial correctly.
Since the drivers are fairly difficult to install for first-timers, and in general, since it took me three tries to be able to install them, I have decided to make a video tutorial (as my first video) in order to guide you on how to install the drivers. Hopefully this video will be a help to you.
You'll also need to search eBay for a male (Xbox to USB) adaptor if you want to connect the controller to your computer, these are relatively cheap, I got mine for around £5, so no problem buying that if you are on a low budget or income, do not worry.
Download link: https://www.s-config.com/dl/bin/XBCD.zip