Usually when I start to play Black Ops 2 Zombies it minimizes it self right when I start it up (for me at least) and I can't open it back up. The only way to close it is by task manager. It opens up over and over and eventually it will workBut, there is a fix! Open up task manager and click the "Application" Tab. Click on the game that minimized it self (It should say its not responding
You can also do it by hand. The process for forwarding a port is usually: Start by logging in to your router. Locate your routers port forwarding section. Put the IP address of your computer or gaming console in the applicable box in your router. Put the TCP and UDP ports for your game in the matching boxes in your router.3qCCqj5.