I hope you guys are talking about legit copy. My friend shared with me a cracked disc of COD which gave me the exact error. I thought as it is not a legit copy, so I bought one. Now that is a bit weird. The game is installed but the issue arises now in patches. I have Windows 7 x64 system. I had downloaded different patches. Now when I try to extract them I am getting 1628 error. I had seen this error before also which goes away on its own. I did nothing. I am sure re-downloading 500MB back is not going to help in anyway.
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