Please help! I installed COD MW 4, played it for one day, but when I tried to run it next day... Got message something about safe mode and i can not start the game anymore. I can play only single player mode. What should i do? Tried it on Windows 8.1 64 bit, and Win 7 64 bit, same thing are happening. But my brother installed it on other computer with system Win 7 32 bit and it works perfectly. Sorry for my bad english.