I just bought Call of duty Modern warfare 3 from steam.
I started the first mission and i realised that i couldn't look around with the mouse.
I checked the settings and found a bit called look. but i couldn't select tha to look around with the mouse.
Thanks! /Atrin Lakpour
First off, have you already tried to verify your game cache? This should be one of the first things you should try. For more information on how to do this please see: https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335
Now, is it only in game that limits mouse control, or are you unable to navigate the menus with the mouse as well?