If you're hardcore gamer, then you definitely know the pain of being thrown off the hot battle in Counter Strike or Quake Arena by pressing Windows Logo key.
In fact, Windows Logo key is a useful one in Windows. Therefore, disabling it with a screwdriver isn't a very good idea. I Hate This Key gives you an ability to disable Windows Logo key in a much gentle way.
Select Only in full-screen games radio button if you want your Windows Logo key to be disabled only when you playing some full-screen game.
In all full-screen games and applications radio button will make I Hate This Key block Windows Logo key not only when you're playing full-screen games, but also when you're working in a full-screen application, like Internet Explorer or Terminal Services Client.
If you don't want Windows Logo key to work at all, select Always class radio button. You won't be able to access Start Menu from keyboard then.
Select Never radio button if you don't want I Hate This Key to block Windows Logo key.

Select Block Windows Logo and other keys combinations check box if you want to block accidental pressings of keys like Win+D, Win+M, etc while playing a game.

We made I Hate This Key to workaround issues with some full-screen games, but sometimes I Hate This Key doesn't recognize a game and let Windows Logo key to act as usual.
Select Hotkey to toggle Win key blocking check box to assign a hotkey combination that will turn on blocking of Windows Logo key and combinations regardless of what did you set in Block Windows Logo key and Block Windows Logo and other keys combinations options.
Press selected key combination once, and I Hate This Key will block Windows Logo key and its combinations, press this combination once again, and everything will work as usual.

If you are a Terminal Services Client user, then you'll probably want to select Windows Logo key equals Alt-Home when pre-Windows XP Terminal Services Client is active check box. This feature will make you work with Terminal Services session as you work with your local Windows session. And Windows Logo key will open Start Menu of Terminal Services session, not local when Terminal Services Client is active.