So after upgrading my Mother Board and CPU, when trying to launch Gta i get a pop up telling me i need a serial key.
I bought the game on Steam and have over 100 hours play time. just wanted to know if there's any solution.

1 decade ago*

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You can see your serial key in your Steam libary. (right column)

1 decade ago
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open GTA 4 folder in your library -> rmb on it -> view CD key.

1 decade ago
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Just fixed it, thanks guys. i feel like such an idiot. :D

1 decade ago
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Closed 1 decade ago by Samy333.