BLACK SCREEN, LOCKS UP MY PC, AFTER *EVERY* *SINGLE* *ARAM*. Understand?

EVERY ARAM. It ONLY HAPPENS in EVERY ARAM... haven't noticed it on Summoner's Rift. [EDIT: Happens in Summoner's Rift as well. Noticed it finally when I was trying to reproduce a bug with Annie which I will post in another thread. It at least happens also in Intro and Beginner bots, and now that I think about it, it has also happened in Normal Summoner's Rift.]

Match ends, and before going back into lobby, black screen. Locks up my whole sodding computer. Takes anywhere from 30 seconds to over a minute (and it's usually on the upper end) to go to the honor screen. I tried the Hextech Repair Tool, full reinstall of the game, reboot, all of that nonsense. Video drivers are up to date. I made sure that "Close client during game" is unchecked in my settings and even turned the graphics settings all the way down.

No sooner than I posted this yesterday, it temporarily self-corrected so I deleted this thread. Now I have to retype this all over again because, with every new patch, Riot has to figure out a new way to break things. Last patch, it was a "failed to reconnect" after champion select that fk'd me out of two ranked matches. Good job. Why am I even here?