While playing with my friends on a server, I get a black screen randomly. Sometimes like 5 minutes into the game, other time like 30 minutes. Screen goes simply back, but music continues playing, I can still control the character as I still hear the sound of his footsteps. Please help. I have tried reinstall. Drivers are okay. This game used to work a few months ago. But a lot of patches recently and it broke my game. Also, no mods. Please help!