Gmod krašit monitor. (Garry's Mod)

Already half a year as I play with two monitors, the second to word - TV. Played in gmod, everything was in order. Last night decided to put the update on Windows, which is constantly delayed. Later I decided to go to the game, but it is not enough that does not start the monitor krašit so much so that his system doesn't see, have to restart PC. How can I be?