Windows 8 - Media Center Romote Green Button fix

Windows 8 MCE (RC6) Remote: The “Big Green Button” doesn't work. In Windows 7 and earlier, the “Big Green Button” opened Media Center. In Windows 8, in some installations, it appears that Microsoft may have left this command out of the RC6 MCE Remote Control device driver. Not so, it's just your IR Receiver didn't get installed properly. If you’ve upgraded your Computer to Windows 8, and either purchased or upgraded to the Pro edition with the Media Center option (Media Center isn't included with Windows 8, even in the Pro edition, so you have to obtain this via an upgrade. This post assumes that you have already installed the Media Center extension, and it works properly. When you first grabbed your Media Center remote, you may have noticed that the Big Green Button no longer works (which, presumably, is why you are reading this). So: how do you get that Big Green Buttton to once again work properly? Fear not: you can fix this, and it is si...