can someone please help me with this. i bought half-life2 when it 1st came out, been playing counterstrike. had to format and reinstall windows, and when i tried to reinstall half-life and enter my cd key (the one that came with the game) it said that my key was invalid cuz it was a duplicate key. is there anyway i can play or reset my cd key without sending $10.00 to washington from british columbia with the key i have and proof of purchase?
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