I have Windows 8.1 Pro x64 and have the latest Xbox 360 Accessories 1.2 driver installed. Whenever I boot up my desktop while the receiver is plugged in, the light does not come on, which I'm assuming that the receiver is not on. I have to unplug and plug the receiver back into the USB 3.0 hub in order for it to "turn on".
Are there any workarounds for this? (This did work when I was on Windows 7).