I have run into this problem before and just turned off my private firewall. This fixed the issue for about 3 weeks to 1 month. It has come about again. When I say can't connect I mean the game launched but it doesn't connect to my internet/can't connect to game servers. I have gone as far as to do a factory reset. I was able to get about 3 successful Over Watch matches in before crashing. I have not been able to access any game since.
Side note: this was for games like overwatch, lol, csgo, and more.
Side note: this was for games like overwatch, lol, csgo, and more.