Laggs or connection issues aren't coming from your PC, most of the time. FPS drops, freezes in game and such things are the kind of problems that can come from your PC.
If you still are having problems and you think it's your PC, try to switch between Wireless and Cable, try with other devices if there are other computers in your house, run a speedtest via your phone, tablet or anything else you might have
I think there's nothing to do about it though, as the problem doesn't come from your PC (my opinion ^^)
Good luck with it.