"Char Jackson" wrote in message
...
On Fri, 19 Jan 2018 18:27:35 -0000, "NY" wrote:

It would have been interesting to see what DHCP traffic is passing between
laptop and router: is laptop failing to request DHCP address or is it
failing to understand the router's (DHCP server's) response? Didn't have a
computer with LAN trace software to look at this.

I agree, it might have been interesting to see what's going on down at
that layer.

[...]
Is this issue something that used to work until one day it didn't, or
did it never work?

It used to work until one day (maybe after a Windows update) it stopped.