I bought the thing on ebay, exactly like this guy did.

Essentially here are the steps:
– (optional) I already had it installed because I’m replacing the legit receiver but you can:
Install the official software: http://www.microsoft.com/hardware/en-us/d/xbox-360-wireless-controller-for-windows
– Start -> Search for “Device Manager” -> Open it
– Find the “Unknown Device” -> right click -> properties
– Driver -> Update driver -> Browse my computer -> Let me pick from a list of device drivers on my computer
– Double click “All devices” -> Search for “Microsoft” in the left pane and select it -> Search for “XBox 360 Wireless Receiver for Windows Version: 2.1xxx”
– Choose “Next” and complete the install

At that point the light turned on on the receiver, I pressed both the button on the receiver and the synch button on the controller, quick dip dip and it was up and running. The difference is I guess they didn’t include the driver with the version from 2011. I had a CD but my drive is dead in this computer and my secondary machine which I normally use the CD Drive over the network doesn’t like the hot weather.