So with all security software disabled or enables, the setup doesn't complete to Activate the printer step. After connecting our printer to our network, router, and before selecting Next in the setup window, I disabled Windows Firewall, Malwarebytes, and Security Essentials. However, however.installing and setting up the 8702 on our PC still hangs up after the step to connect our printer to our network, router, and asked if the printer was installed using its IP address-which it wasn't. The simple fix was to delete this unknown device since Device Manager already showed our printer in the listing. As it turned out, the unknown device was another instance of our 8702 printer. I was able to learn how to find out what this device was by going into Device Manager and under View, select show all hidden devices. However, there was still an unknown device causing problems. I had no idea which driver was needed so I worked my way down the list until the Null driver was able to be installed. When I ran troubleshooter on this device, three drivers were found. In device manager only one of the unknown devices was shown the first time I looked for the unknown devices.
Found out they were missing drivers for our officejet 8702 printer. I was fighting two unknown devices on our PC. It sure would be nice if someone has run into this same problem and has the magic answer. I even went into c:\ drive under the HP file and deleted everything possible, after going to Programs and Features and uninstalling programs there. I checked on the HP site for a solution, but they're ones I've already tried. Even with the firewall off, the 123 install software still stopped at stage 3, Activate, again claiming the internet connection cannot be found. But when I tried installing the software a third time, fourth time, or how many times I've tried, I made sure the firewall was off. I previously said I had shut off Windows firewall, but found out I hadn't shut it off. I know better than that 123 installation software that the internet connection has not been found, so something is blocking it from seeing the internet connection.
Now my only problem is reinstalling the software for our HP 8702, which keeps stopping at the activate stage, claiming the internet connection has not been found. Somehow the Registry setting had been changed to disable, and the site I found showed how to reset it to enable. However, the problem with the Teredo adapter has been fixed, at least the PC is happy. Yeah, according to what I found, if the Teredo Tunneling Adapter exists, and you follow the YouTube video, a second instance of the adapter will be installed a subscript 2 will be next to the one just installed.
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