Edit: appear to be a false positive at this time, thanks Mudface:
http://www.mapmodnews.com/article.php/MW2-AVIRA-Crypt.XPACK.Gen-Trojan
Original thread link to people having the issue:
http://www.modernwarfare2.com/forum/viewtopic.php?f=24&t=181646&sid=a32e6df976d6a59a9835e59b1a00d253








