Mouse and key bored stop responding for 3-5 seconds in game

Sorry, don't know if this is the right section or anything but I just can't find anything online, this just started today, while I'm in game my keybored and mouse freeze and stop responding for a few seconds, it makes it quite hard to farm and fight, I have a Razer deathadder 2013 and a blackwidow ultimate 2013, I'm not sure whats going on because it only happens in league and outside of being in a match. if its already been solved please link me. couldn't find anything online
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