Enable/disable Windows key on keyboard

TL;DR: Use Fn+Win or Fn+F6.

I accidentally turned off the Windows key on my keyboard last week. At first, I thought my keyboard had broken down. That would be a bummer since a lot of my favorite shortcuts depend on it. After some debugging and googling, I found the combination above. Although Fn+F6 doesn’t do anything for me, just the Fn+Win one.