I just bought a new top-of-the-range computer, and assembled it myself. Yesterday, I was playing on games fine. However, I tried to play on the same games and it failed to connect - this is for every game I try.
I've disabled my router firewall, my anti virus and windows defender. Nothing in any of their logs have anything to do with blocking connections. I can go open games' launchers, I can do everything on websites, but as soon as I try to connect to a game's server, it doesn't work.
I have several other computers using the same internet connection that work fine on the same games, so it's not an issue with the router (although I have tried resetting it). I can only think it is something to do with my computer and/or its wireless adapter, but as it was working yesterday and I haven't changed anything I can't think of a problem.
There was a brief error message after I reset the router for my computer when I tried to load the internet (something about DNS), but it was only for 3 minutes or so and I'm not sure if any of my other computers had the same problem or not.
I hope I've provided enough details for someone to fix the problem, I'm completely stuck :(