http://arstechnica.com/business/2016/12/microsoft-windows-10-dhcp-broken-update/
Excerpt:
Microsoft has quietly fixed a software update it released last week,
which effectively prevented Windows 10 users from connecting to the
Internet or joining a local network.
So Microsoft broke the DHCP client on Windows 10 computers. But now they say they have a patch to fix it.
My question is: How do you get the update if you can't get online?
Certainly, my 92 year old grandmother wouldn't know to set up static IP, for instance. All she would know is that it quit connecting, suddenly. She might not even try again for a week.
--> This is not a duplicate, because you can't renew an IP address if DHCP isn't functioning. The non-technical user is simply stuck. It simply cannot connect - it never gets an address or gateway.
Gram is not a computer scientist, so would be more inclined to take it back to the store than to call me.