XBox One Controller Not Working After Anniversary Update

I've just applied the Windows 10 anniversary update and found my XBox One controller no longer worked. The controller appeared to switch on, but would then almost immediately switch itself off.

Logitech Unifying Receiver Lag - Solved!

I'm a big fan of Logitech's Unifying Receiver technology - I have the Performance MX mouse and the K800 Illuminated keyboard, both of which are excellent. One problem, however, seemed to affect the mouse particularly: Intermittent lag. Every so often the mouse would stop responding, do something weird or behave in a temperamental and highly frustrating manner. Happily I have managed to find a solution to this and resolved all of my lag problems.