My pc can only connect to YouTube, fortnite, Spotify, etc. Does not work?

Am
4

My pc has been able to connect to youtube for some time now. My games fortnite, cod etc and also Spotify Teamspeak etc can't connect to the internet. We have already reset the router and restarted. (I have little idea of all those servers, proxy and so no idea what that is I hope someone can help) ps. I have Windows 7

We

An idea:

You may need to change a network setting in Windows 10. Your own local area network needs to be switched from public to private network.

Here it is described:

https://unsicherheitsblog.de/windows-10-netzwerk-von-offentlich-auf-privat-andern-4833

Am

I had forgotten to say that I have Windows 7. Nevertheless, I try it thanks.

Am

Unfortunately did not work.

We

Another idea:

Could be too slow DNS server of your offerer.

Can it with the Google DNS servers (8.8.8.8 and 8.8.4.4) try, if it does not help, then put the DNS server back to automatic.

This is how it's done:

https://unsicherheitsblog.de/alternative-dns-server-windows-7-vista-xp-konfigurieren-1229