Try resetting back to your default mouse settings, no custom cursors or anything. If that doesn't work go to 'Options' then 'Custom Settings'. Then change your mouse settings.
you can get a cod6 book at game
For single player, COD6 is longer but is the same in fun as COD4. However, multilayer in COD6 kicks COD4's butt. So if you are asking which should I buy? Get COD6
no
no its a 18+
No
BOOM!
There isn't any !!!
Infinity Ward
cod6
no
yes
get to rank 70 then you will prestige