With cell phone Wi-Fi with laptop not?

I'm having problems with the internet.

Here's the situation: I have internet with my cell phone (via wlan), but not with my laptop.

I can use Google and YouTube on the laptop. Videos are played, I can't use other websites.

The DNS server error is displayed on other websites.

I tried all possible solutions from Chip.de regarding the DNS error.

I restarted my laptop and the router, let my IP address run through the problem treatment as changed with Chip de, connected directly to the router via ethanet and unplugged the network adapter (signal amplifier), the Internet on my laptop deactivated and activated again. Updates have only just been carried out by my laptop, this can't be the problem.

I just don't know what else to do…

I know I have internet, I can use my cellphone to get in via Wi-Fi…

DNS changed to 8.8.8.8 and 8.8.4.4?

I had it on 8/8. 8.8 changed. Now I've also added 8.8.4.4 as an alternative and it worked.

Problem has been solved.