Ok, so today I was trying to play gta 5 on steam and with the newest update the game crashed every time story mode would load. When the game would crash my PC would complete freeze and I had to manually turn off my computer. When I turned it back on the screen would stay black even after the loading screen and my k70 would light up and then shut off again. So I had to do a system restore to a couple days ago. So I'm finally in and I notice my PC is acting really weird, it's super slow and bogs down when I right click on anything. So I try to go and enable sli becuase the last thing I did was install the driver and when I click on enable sli it dosnt ask me to shut down some programs like it usually dose and just turns it on but the screen goes black and I have to restart my PC again. sli will not enable itself. I've teied rolling back drivers and reinstalling them too.