Computer Shuts Off when I open Crossfire

go to start and run type sfc /scannow if you turn up errors let me know

if for any reason you have installed some form of a third-party program that may have infected your computer with a Virus/Trojan/or other form of Malware disguised as some form of help for you in the game private message me and I will help to resolve this.

There was a group of people who made a program to help players cheat however it was a disguise of malicious software to discourage players from cheating.
Unfortunately for those who are affected your computer is completely compromised they have access to your computer to remotely reboot upload files execute programs extract data as well as key strokes just like a key logger.

I wasn't directly saying you have done this I was just putting the information out there