if you are having problems installing on the windows 7 os, you need to manually change the setup options. Uninstall cod2 completely. insert disc into drive. DO NOT FOLLOW AN AUTORUN PROCEDURE. View the files on the cd. Find the program 'setup' right click 'setup' and select 'properties'. Select different os on the compatibility tab until you find one that works. I have to use win 98 through this procedure to play cod2.