Sound cut out and crashed my game

So I guess it all started when I downloaded Windows 10, where I would play a game of League and everything would be fine, but then around the same time every match the volume cut out for the duration of the game. It wouldn't happen all the time though, it was occasional and for the longest time I didn't have this problem so I never bothered to report it. Until today. I was playing a game with one of my friends and the sound cut out when I was was midway level 7 with Katarina mid lane. It when on for a while, but I managed to get the sound back by disabling all sound in the options and turning them back on, so everything was back to normal. However, a while later the sound went off again, and I tried to do the same thing as I did before to get the sound back. But this time I was moving down to the bottom lane rather than idling at the nexus (I'm not sure if these details make a difference, It might help for debugging or something though or someone might have the same problem). But when I went to disable all sound and press OK the entire game froze and I couldn't get back into the game, I tried to open task manager to access other programs, which usually works, but I couldn't do anything and my screen was all black. I had to log out of my computer and sign back on so that I could access the game again. Anyways, if anyone has had similar problems or knows of a way to solve this It would be greatly appreciated if they posted here.