Start by going to network properties
DISABLE IPV6
i am not quite sure what the trigger event is that started this (ISP or cable company making changes from above?)
OR
power off your ENTIRE network.
cable modem or fios box,your router if you have one, distribution switch.
leave all powered off for 10 minutes.
power up the cable modem first, wait 5 minutes, turn everything back on sequentially then the FX.
the computer last.
redo that ipconfig command
there should be one IPV6 address for your Ethernet adapter NOT a temporary one.
if things are not back to normal DISABLE Ipv6
i can post instructions with screenshots if needed
who is your ISP? Who gives you internet?
this problem is starting with them, I suspect
busy day but I will watch your thread if you post More info