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I just installed Call of Duty 4 and when I try to run the single player mode nothing happens. I just see a quick flicker on the desktop but the game doesn't launch. When I try to run it again, it gives me this message:

It appears that cod4 did not quit properly the last time it ran. Do you want to run the game in safe mode?

Multiplayer seems to work fine and when I try to switch to single player from the multiplayer menu the same thing happens, it just goes back to my desktop and that message shows up again

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Is this via Steam, or physical disk? –  Topperfalkon Sep 27 '13 at 23:07
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2 Answers

I had this issue on Windows Vista (yep) and I assume its on Win 7 too. Plug something into the microphone audio jack.

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This does not really answer the question. If you have a different question, you can ask it by clicking Ask Question. You can also add a bounty to draw more attention to this question once you have enough reputation. –  Studoku Mar 31 at 9:54
    
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post. –  Jutschge Mar 31 at 11:00
    
@Studoku and Jutschge, your comments don't seem to make any sense. Was this answer edited after you commented, or something? I can't see any edits, looks like a completely ordinary answer to me... do you have some kind of bots commenting? The comments look copy-pasted...? –  MGOwen Mar 31 at 11:10
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It can be several options. First try to run the game as an administrator and see what happens. Also, if the game is not original you would need a good patch. And finally, uninstall and re-install the game. Sometimes the patches for multiplayer give these kind of problems. Back in the day, with the game beat couldn't play single player anymore.

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