First off I am not a McAfee fan and I would not wait until McAfee decides that your game is Ok or not, as Jenny100 pointed out it is a False Positive, if it was me, I would simply make sure to disconnect myself from the Internet, then stop McAfee services, then install the game, when all is good, re-start the McAfee services and re-connect myself to the Internet.
There many people who are disappointed with McAfee and have switched to another Security system, depending on your Budget, you can either buy another reputable A/V or get a Free one and there are good Free ones out there.
Just my 2 cents worth.