How to turn on an infrared vision in Crysis 2 Demo

This kind of error can sometimes be solved when you verify the game fragmentation, through the game options.

Game fragmentation usually happens when you download too many games at once through Steam, or when a game is being downloaded by too many people at once.

It can also be caused by running a process which does a lot of disk access.

I found the answer in this thread, especially this post helped a lot. It's unpleasant for me to answer my own question, but there came no one to help.