DNS server is not responding?

Sometimes when I download a large game on Steam my wifi stops working and I get "DNS server is not responding" then I have to disable the wifi adapter and enable it then it works. I know it's not a steam issue. But does anyone know the problem and how to fix it? I've tried all the ipconfig... show more Sometimes when I download a large game on Steam my wifi stops working and I get "DNS server is not responding" then I have to disable the wifi adapter and enable it then it works. I know it's not a steam issue. But does anyone know the problem and how to fix it?
I've tried all the ipconfig commands and it hasn't done anything.
I've made 8.8.4.4 my DNS and it didn't work.
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