League of Legends: My game is freezing out of nowhere

Solution 1:

Have you installed LoL a while ago?

There are often problems with logs starting to be too big and being 'too big to managed' by the OS.

https://support-leagueoflegends.riotgames.com/hc/en-us/articles/201752674-Network-System-and-League-of-Legends-Logs#section-windows

Basically, in windows, opening a 4k file on the fly? no sweat. Opening a 4gb file on the fly? that could cause problems.

So my guess is you might have huge log files, and when it needs to open it to write something in it, you experience the freeze.

Solution 2:

Basically what @Fredy31 said.
Addding to that you can download HexTech Repair Tool to delete log files IIRC.