How to fix sync issues on Xbox and PC if your controller won't connect

[Windows Central]

Controller, controller, where for art thou controller?
Even the best Xbox controllers may become desynchronized at times, for a number of reasons. Whether an unruly update knocked your controller offline, or you reset your Xbox to start afresh, there are a number of ways you can fix up and resync your controller to get back into your game.
Here are some steps you can run through to try to sort it out.

Full story from the WindowsCentral blog...