League freezing randomly

in about 40% of my league games it freezes 2-3 minutes into the game, forcing me to close it using the taskmanager (which I cannot see) and restart the game. I hear a notification sound at the exact moment the game freezes. I've had this problem for about a month and it makes the game barely playable, especially when playing Jungle. I'm using Windows 10 and League is the only game in which it happens.
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