Have you upgraded to windows 10 and noticed that your middle button no longer is activating big picture? Awfully frustrating! I’ve not actually found a guide online to fix this. But I’m here to show you how, it’s a simple 2 step process.

Press the Windows Key + G (or press your center button) to open this menu. Click the cog on the right.
That’s it! Once you’ve done this your Big Picture will work. If you ever want this back (for some reason) you can still reach it with Windows Key + G. Happy gaming!