How to Fix the Call of Duty Modern Warfare Installing Shaders Bug
If you're reading this, chances are you've experienced the "installing shaders to optimize game play" bug. When installing the game, you will need to undergo the process of installing shaders however, there's a bug going around that freezes is progress.
To fix it, there are few things you can do. First, head to the battle.net client and hit "Scan and repair". This will do just as it suggest and attempt a fix for the problem right away.
If that doesn't work you can always cancel the installation and and reinstall it. Though, that would prove very time consuming.
The last and final thing you can do to fix this bug is wait for Activision to hotfix it. They acknowledge it is a problem and are working on a solution.