Can't connect/login on Windows 10 x64 pro

First my setup, which was working fine with version 1, the main machine (server) is a windows 10 pro (upgraded from windows 7 pro) x64 optiplex 9020 with 8gb RAM. There is security software on this which I do not control (Symantec EndPoint Protection - Managed version 12.x). I also have several pieces of antiransomware software (Malwarebytes beta, BD antiransomware, WAR, Kaspersky Anti-Ransomware tool for Business, as well as cryptolocker). I had all of these running (except WAR) when versio

I have -figures cross- identified the problem and current testing show login authentication is back online. I want to clarify as people are mistaking this as the exact same issue as the original report from this thread several years ago. This is NOT the same issue, although the error manifests itself in the same way they are unrelated. I want to apologize for the time it took to find and fix the problem. Jamie