Freezing when applying settings and low fps for no reason.

[Layka_Kiro]

The game itself runs poorly (even after trying the fixes listed in "Low FPS? Read this." Any attempts to change any setting causes the game to freeze upon applying the setting. It doesn't crash, it just stays frozen.

[Resxt]

Change your video settings without crashing the game (borderless windowed)
Make sure your game is closed before doing that.
Go to where your Modern Warfare 3 is installed and go in the players2 folder.
Then open plutonium.cfg with the notepad to edit it.
Find r_displayMode and change it to be like this (you can use ctrl+f to search for it):
seta r_displayMode "windowed (no border)"