Help please

My game crashes all the time i cant play singleplayer or multiplayer in multiplayer i crash after a few minutes into the game same with sp im still stuttering a little but the most of the lag and stuttering is gone with the update. Any 1 got a fix or some info or what ever really annoying

There is a help section and tons of tutorials on subjects like this.

Or search around on google helped my lag (: The lag spikes and all that sh*t even tho i setted priority to HIGH on BO and steam to low it still was there. So i use Game Booster V2 BETA