Gears of War 2 was never officially released for PC. It remains an Xbox 360 exclusive, though it is playable on newer Xbox consoles via backward compatibility.
If you want to play the series on your computer, these titles have official PC versions: (Remake of the first game) Gears 4 Gears 5 Gears Tactics Töltse le a Gears of War 2 PC-játékot 2008
Fake installers designed to harm your computer. Phishing scams: Sites trying to steal your personal data. Gears of War 2 was never officially released for PC
Since there is no native PC version, here are your legal options: here are your legal options: