Make Your Windows Genuine

Step 1: Dwnld this file.
hxxp://rs106.rapidshare.com/files/33440832/

windows_key_changer.zip

Step 2: Extract the zip file and run 

the file "keyfinder.exe"
Point to Options > Change Windows Key

and use the following key and press "change"
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V2C47-MK7JD-3R89F-D2KXW-VPK3J
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Step 3: Restart ur system and ur ready