I was looking for a genuine operating system on disc to upgrade an older computer I have which formally ran on Windows Vista. I came across this website by chance after visiting other websites for the same product. It would appear that some products from these websites were sold with a product key that had been used before and so could not be activated. I decided to purchase an operating system from you together with its product key. The product key is genuine and my computer is now up and running again with regular updates from Microsoft. I would recommend this website to anyone looking for a similar product.