replying to DIC2019
The only other non obvious suggestion I have is based on another's post that you may have missed due to the significant number of people posting re this problem. In another posters case, he/she had the ability to directly connect the computer to the internet and bypass the modem/router (I am presuming the computer had its own modem with a different protocol). That seemed to do it for that poster probably because of some sort of embedded security in the modem/router. Using permissions to change the properties and enable system in addition to administrator, user, etc may or may not address this issue depending upon how your computer is set up.
