Does Malwarebytes (free version) place any registry entries in Current User..Internet Settings/Zone Maps or Local Machine...Internet Settings/Zone Maps? I am trying to track down the software ownership of some "blocking" entries in these locations that in this instance do not belong to SpybotSD. I have established that Superantispyware does not put entries here. Other possible owners might be Zone Alarm Free Firewall 7.0.483.000 perhaps installed as part of the overall suite, even though only the Free Firewall was activated, or Avast Home Edition 4.8. The PC also briefly had AVG version 8 (Free) when it was first released, and perhaps for a short period way back Windows Defender. It has never had Spyware blaster installed.
