My gears of war has been fine for over a year but when a virus struck my new computer i had to reinstall windws xp. i fully updated it again and installe gears of war. when i ran the game a got a message saying that the exe gears of war liveexe file cannot run with modified exextuble code and that i needed to reinstall the game. so i did the same happened. what is the problem and how can i fix it?