Have you ever wondered what that windows key between Ctrl and Alt on your keyboard does? Yes, it does minimize your games and steal window focus if you accidentally press it, but it has a real purpose, and is actually quite convenient. There are a bunch of shortcuts built around the windows key, but below are the most useful ones on a daily basis.
Win + L: Locks your computer
Win + D: Shows the Desktop
Win + M: Minimizes all programs
Win + E: Opens Windows Explorer
Win + R: Opens the Run dialog
So now you know that the Windows key isn’t completely useless. Problem is I find it does as much trouble by stealing window focus than it does from faster computing.