This problem just happened frequently those days. When I was during the game, my computer may crash with big annoying noise and unmoved game screen. After a few seconds, the sound backs to normal, but the screen is still unmoved. I can quit to the desktop and everything else works good. However, I cannot close the task "League of Legends.exe" in my Task Manager. I even use cmd taskkill to try to shut it down, but it does not work. This task takes 900+ MB soild-state memory all the time. I cannot to rejoin the game I quit because this, and my computer could not turn off by normal way.
The only way to close this task is that I shut down my computer by pressing the power key. This is the only way I can DO!
So I really really need help with this problem! So could Riot helps me?
I can provide any further information if you want, like the r3dlog or information about my computer that can help you solving this problem!