Hi guys, Two months back my PC decided to die on me and I can't run it. Thus, I've borrowed another window 7 CD to reformat the PC and now it has came to a stage that I've lost my product key and there is no way to obtain it since this PC was bought 5 years ago. The sticker was gone as I've changed the casing of the desktop and retailer is no longer valid. I've tried contacting Microsoft to no avail. Can anyone assist with a product key? Thanks in advance !