Ok, guys heres a tutorial on how to get the wireless receiver to work properly with Windows 7.
Xbox 360 Wireless Gaming Receiver For Windows 7 Tutorial
Where I got my Receiver: Microsoft Xbox 360 Wireless Controller Adapter Driver
Download Link: Xbox 360 Wireless Gaming Receiver Drivers
Installation Directions: To use an Xbox wireless receiver on windows 7 operating systems, install the drivers
from your disk, or update from the website. Once it’s done installing, then plug in your receiver. Windows will say there are no drivers found for the device. With it still plugged in, go into your start menu and choose “Devices and Printers.” Scroll to the bottom of the page and you will see an unknown device, under the unspecified tab. Right click the icon and choose properties. Click the hardware tab and in the box there should be one option, double click it. Under the drivers tab click “update driver”. A window should pop up saying that there are no drivers, click “Browse my computer from driver software.” Then click “Let me click from a list of drivers on my computer.” Scroll down to the bottom of the list to find “Microsoft Wireless Receiver for Windows Version: 18.104.22.1689 [Date]”. Click that option and then next. A warning will come up telling you that windows is not sure the are the right drivers. If you are sure you have the right ones click yes and you should be done. Your wireless receiver is now set up. Just link your controller to it and start playing some games.