I would say it's "Vis nettwerk og -oppgaver", "Koble til nettverk"...
This is a US-English forum, not sure if you're Norwegian or Dutch, I'd guess Norwegian, I'm a Swedish speaking Finn with good knowledge in German, so I do have a connection there... most in here don't probably have it.
I'd say, a cable contact could be the problem. Check you don't have cables twisted, or have had your dog bitten them.
Go to Control Panel > Device Manager, and check if you have some question marks there. Or uninstall your net drivers, then re-install them. Or put in the original drivers you got with your computer / motherboard, maybe via re-installing all on your mobo? It may take you a step back, but you can always update later.
Is it a new problem, appeared recently, whilst everything worked well earlier? Or a new installation that won't start properly?
Lykke til.
P.S. Have your personal files in another partition or disk, separated from Windows. That way you can re-install Windows without affecting your personal files.