A few pages back I posted a fix for this problem. Several people have responded that it worked for them. I was using WIN7 at the time so I know it works for that OS. I took the bait and upgraded to the "free" Win10. Which is not without problems of it's
own. GOOD LUCK.
"The message may lead you to believe that there is more than one computer on your network with the same IP address. After installing itTunes so I could tether my iphone via the USB connection I started receiving this error message.
Most of the responses I read were pointing to a lot of things you cannot control so I started to look at things I could change.
I went directly to the network connection I was currently using (my iphone). I opened Network Sharing Center (Windows7 on my laptop). My current connection was shown as Local Area Connection2. Left clicking on that opens the properties screen left
clicking on the properties tab will open the configuration panel. The panel will display your current installed protocols and the check marks indicate which ones are being used. In my case IPV4 and IPV6 were both installed and being used. Unclick them one
at a time and see which one is necessary to keep your connection up. When you only have one selected and your connection is still active the error will cease and desist. In my case IVP6 was the one that had to go.
Windows does not discriminate between devices each one you hook up and install drivers for will load the protocols it needs but the other protocols will still remain active until you deactivate them. Generally the oldest protocol will work for all."