League is Shutting my computer down

Is anyone else having this issue since the new patch? It seems to be at different times and for different reasons, but it's all during game. At first the Game forced my entire computer to turn off once the game started...(Loading screen hit 100% I saw the shop and was welcomed to the rift...OFF). During another game it happened again at the same time, I turned the computer back on, loaded the game and I played it fine, then it shut off again during the "Victory" message. Finally on another game I was playing Mordekaiser and it just shut off my computer off 4 times in this game, some how it was every time I used my Ultimate (the R button).

Some weird things going on here, I submitted a ticket and the "Grease Bat" person had me uninstall reinstall the game, and the graphics card, I reloaded the patch, I did a full scan of my computer for Malware and Viruses, I did everything this guy asked me to do, and then he ghosted me for 24 hours for some reason haha. Either way this is a big enough issue that I would like to fix it. I submitted another ticket, hopefully I will get an employee that will actually try to help me, until then, has anyone else had this issue? Any advice? Ive tried the most common stuff at least 5 times a piece so far, thank you guys in advance :D

Also to add...This now happens with every single custom game that I try, I've read many other Posts about this, seems this is an on going issue since the Ascension game mode. I found one thread that had this issue and he was able to fix it, but for some-reason he never posted how he solved the issue, he stated it was solved and in the OP. I don't know what an OP is and a later comment said that you can't even see the OP anymore because the thread is so old. So it seems that this same issue is here again and even though it was fixed in the past, I can't see the solution...Thoughts?

P.S. I had already posted this with a different name, but people read it and no one commented or up voted so the thread was basically washed away, here is attempt number 2 :)