FIX YOUR F***ING GAME ALREADY!
There is a bug with Avast since almost 2 Months! I have to deactivate my Avast Internet Security every time i want to play LoL! Sometimes the bug is gone but with EVERY NEW Patch it comes back! You said you knew there were problems with Avast but its still not fixed.
Also a new bug: Game starts without you. No loading screen... nothing. Just "Game is still running". Funfact: Just restarting doesnt work. You have to start Task Manager and close the LoLGame.exe manually.
If you are like me and Tab on Desktop after you chose your loadout you will not realize that game starts without you. So i lost 15 LP because of "remake".