I found this in the internet and thought that this would help you all a lot. Microsoft has undertaken the sale of their product very seriously. This tool, called the Windows 7 Activator, will help you transform your pirated Windows 7 into a genuine, OEM Version Windows 7.
Follow the link below to download it. I have used it in my own PC and it works 100 %. But as always, use at your own risk!!.
DOWNLOAD LINK:
Click here to download