If you mean the original Xbox controller, simply plug it into your Xbox. If you mean the Xbox 360 controller, check if it has enough battery, if not, get the charger and plug it into the controller, then into a USB port in the Xbox 360. If it does have enough battery, merely press the Xbox icon on the controller.
Chat with our AI personalities
I always called it an Xbox controler.
minstrels
if you get a adapter
To connect a PS3 controller to a PC you need to download a program such as MotioninJoy.
you have to click the small button on the controller at the same time as you click the small button on the xbox 360 and hold them until the green light flashes (not the ring but the one who tells you that you are 1 player or some other player of course)