What do I need to use a 360 controller on PC?

Well they stopped selling the Official Microsoft one a long time ago, it's only available now WITH a wireless controller for windows bundle, which includes a wireless controller, which you already have and the receiver

Official receiver that I got in 2007 looks like this http://upload.wikimedia.org/wikipedia/commons/0/08...

Although there is a Massive amount of places selling an UNOFFICIAL xbox 360 receiver as if it was a MS receiver

http://www.google.com/products/catalog?client=oper...

A USB on the spot receiver for all Xbox 360 on the spot peripherals. So confident, you are able to ultimately use the on the spot controller, the drawing close on the spot rigidity comments steerage wheel or maybe the on the spot headset with USB goodness....the place is the link to the area with the suggestions, i'm hoping this facilitates

It's called the wireless gaming receiver.

http://www.amazon.com/Xbox-Wireless-Gaming-Receive...

You plug it into your computer. If you Vista or Windows 7, it will detect and update it. If you have XP, you have to install the drivers. It comes with them on a disc or you can get them from here http://www.microsoft.com/hardware/en-us/d/xbox-360... . Once that is installed, you can turn on and sync your controller to the receiver like you'd sync it to your 360. If you normally use the controller on your 360 make sure you unplug your console first while syncing to the receiver or it will turn the 360 on instead.