DirectX

So sometimes when I try to play theres this bug - error - dont know how to call it.It says "An unknown DirectX error occurred and League of Legends cannot start.Please make sure your video card is using the latest video drivers from the manufacturer" Funny thing is my drivers are ALL up to date so this is some kinda bullshit.I tried to reinstall Nvidia Geforce Experience (the thing that updates my drivers) checked WINDOWS updates - nope everything up to date and working fine but nah League of Trolls has to throw an error before every match so I could get more bans for afk. So the only way to remove this error is to restart my pc - whitch I was doing so far but I got so tired of this "Try to play, get error, restart pc, come back in the game 10 minutes late or even more then try to play another game with the hope to not get the same error again" bullshit.So I want to know if there is some sort of fix or.....SOMETHING that would help me stop these afk bans once and for all....because now I have to wait 20 minutes for every match just because of this annoying error.