Need a gamepad for that trending console-style indie PC title and happen to have an Xbox One controller handy? You may already be set, as Microsoft has at last released drivers that will enable support for the Xbox One controller on PC.
Just grab the right driver for your operation system (Windows 7/8 32-bit or 64-bit) via Major Nelson's blog post linked below, install it like any other, then plug in the controller via micro USB cable. That part's important, as these drivers don't support wireless connectivity for PC and the Xbox One controller doesn't work with the wireless USB receiver for Xbox 360 controllers.
Games which already featured gamepad support for the Xbox 360 controller should continue to work with the Xbox One controller, though obviously any Xbox One specific features won't be enabled.
At time of writing it appears there are some hiccups with getting the 64-bit version of the drivers to work with Xbox One controllers using the updated firmware released in April. Reflashing the controller back to factory firmware via the Xbox One has reportedly solved the issue for some users. Let us know in the comments if you've encountered similar issues (and managed to work around them!).