I've been running Counter Strike: Global Offensive on my laptop (NVIDIA GeForce 840M 2GB and an Intel processor) at 150fps, however after the 15/3/2017 update I'm suddenly experiencing only 30fps. Worse, whenever I see an enemy and shoot it drops to 15fps.
I haven't made any changes to my PC prior to the CS:GO update on 15/3/17 which is why I think it's the culprit. I've tried reinstalling everything: Steam, CS:GO, Nvidia drivers and changed a lot of settings. I also made sure to pick the Nvidia card for the game.
Sometimes my FPS goes back to 150 but whenever I open a menu it drops back to 30 or it goes back down to 30 in a couple of minutes. Is there any way to fix this? It's making MM unplayable!