If your antivirus software has a Gaming Mode, remember to switch it on before starting the game.
Shut down any apps like BitTorrent, web browsers, instant messaging tools, Skype type tools and music apps - all of these soak up memory and/or bandwidth that CODBLOPS will want to use.
CODBLOPS is a very system intensive game, so before even firing it up, make sure it has as many resources available as you can throw at it.
