My computer is running the Windows XP operating system with 2 GB RAM and Core2Duo processor. I have bought this new game called Sniper Ghost Warrior. I am trying to install the same in my system. The situation that I am facing is that Sniper Ghost Warrior Serial Key is invalid. I am not able to understand why this is happening. This is because I am entering the same that has been given on the pack of the game.
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