Windows 7: Original Microsoft Games Problem

When you press tab in any of the Microsoft games that come preinstalled with 7, it switches the selected card. However, in ALL of my Windows games, it's as if my tab key is being held down, rendering me unable to play the game. I have no idea why this is an issue, and it doesn't happen anywhere else. Any help would be greatly appreciated. I've already tried turning the games on and off, but no help from that.

How about switching the key to another one? Or can you?

What do you mean? Should probably add that I'm not pressing tab at all. I'm unable to play the game because from the second I open it it's like the button is being held down