Xbox 360 windows controller help needed!

[Seizure Explosion]

Alright I just went out and spent 40 bucks on the special windows-supported version of the xbox 360 controller and I can't get it to work!

I put in the driver and hooked it up. Then I find out I cant get it to work in any games!

Does anyone know how to get to the setup for this? I cant reach it.