There appears to be several threads about this problem, and they seem to think it might be related to an update. The last update I got was an Adobe one for Reader.
If you open an Administrative command prompt and type.
ipconfig/all > %userprofile%\Desktop\ipconfig.txt
You can copy and paste the command in the command window by right clicking and selecting paste in the command window. The admin window is not necessary for this command, but is for some of the others.
But I will assume that you will show an IP address of 169.xx.xx..xx in the resulting readout.
I am not the network expert around here, but I dabble. In that same command window can you ping certain places, like yourself or your router?
ping 127.0.0.1
ping (your...