Random Disconnects.

Hello, my friend is having a problem. when we play a match of League Of Legends he randomly dissconnects throughout the game. if he reconnects he can play for a few moments and it says - attempting to reconnect . We play at my house. I am using a PC ( no problems ) and he's using a Laptop. so anyone knows the fix for this? Regards, NegativeA EDIT : also he brought his own laptop from his own house. and still the same problem.
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