I have seen many topics regarding this problem yet It seems there is no fix. I'm playing a game, randomly windows notification sound comes and then league freezes. Now this doesn't happen every game, its very random but it will happen at least once in a day. I have to alt+tab, end process which shows it as (not responding) then reconnect. Now I have seen a lot of posts regarding this, but I guess riot will only look into if A LOT of people are having this problem. I'm hoping this issue gets bought to life again so riot can help us minority who are suffering from this problem.
FYI, I have tried:
Hextech repair tool
Uninstall and fresh installation
Checked for any compatibility problems
Updated latest drivers
I am running out of ideas and its annoying af.