I have a controller for my pc that I use for several different games. It worked fine before but out of nowhere, it started refusing to connect. Whenever I press the sync button on the controller and on the receiver, there's the spinning light as usual, and they suddenly stop, signaling that they've connected, but then the controller just flashes instead of actually connecting. I've tried updating the drives, uninstalling/reinstalling them, restarting the computer, and unplugging the controller and plugging it back it, to no avail. Does anyone have any idea why it won't work and how to fix it?