Bear17

Hi all, just new to this site, apologies if this has already been covered. Have followed the advice previously metioned however the game I have it the bought disk not steam, that funtion does not work for me it just logs me into steam main window and I have no access to start the game. I done an uninstall and a reinstall and update of everything still no joy. Would appreciate any help if I cant resolve this just going to throw game in bin and go back to xbox, Woud prefer to stay on PC and zombie on. Thank you for any assistance given. Bear