Minecraft Forums

Since yesterday, after a few minutes of running minecraft with no problems, it will freeze my entire computer, then my entire computer screen will blink black and the computer is unfrozen but the minecraft screen is left with a black screen. When I close the minecraft window and try to open it up, it will not even go to login screen and straight to black screen, and the only way to play again is to restart my computer and it will all repeat. Only mod I run is optifine, I have tried deleting the .minecraft folder all together and getting a vanilla one from minecraft.net however that does not work as the problem resumes a few minutes after reinstallation. I have been playing minecraft on the same settings and computer for the last 4 months and no recent java or minecraft updates have occured.