Hi approximately last year i had my system rebooted by a friend, well we thought we had lost the key so he kindly gave us his, as of yesterday we recieved an update saying our computer CD key was not genuine. This is odd becuase his key was legit. I then discovered that the cd key was printed on the back of the pc on a little sticker, i hadnt realised this before. I decided to change the CD key with a tutorial that i had found, i typed in my Genuine CD key and clicked "update" and then it gave me the message that it was an invalid key. Now i am confused becuase i dont know what has happened. I can prove that it is a legit key whatever way you would like but i am not willing to pay more money.