Just that the thread name says.
I ask this because I recently bought an Xbox 360 controller (2nd from some guy's webshop) and it doesn't work on my pc (64bit Win7) (or any other pc/laptop).
So I mailed the guy I bought it from, and he says that the controller I bought DOES NOT work on the pc, only on the Xbox 360.
The kind of controller is shown here http://www.dx.com/p/genuine-microsoft-wired-game-controller-for-xbox-360-oem-pack-18436 (don't mind the source, it's just about the picture it contains)
ps: I'm not sure I posted this in the right section, feel free to correct me.