This explains yesterday's foibles. I was unable to log into any of my hosts on 6 robot computers. They were reachable. Today all is fine. I have a mix of 7.1 & 7.2 hosts due to the malware issue with 7.1 and defender on Windows 8.1 I have not put an exception record on my 8.1 robots.
The malware issue is wit the 7.2 hosts and defender on Windows 8.1
Could you please elaborate a bit more on the "malware issue" part? Is there another antivirus software that mistakenly detects our program on your computers? As for the Windows Defender - unfortunately, we have very little control over the antivirus detections. However, this issue can be easily resolved by submitting the false positive report to Microsoft on this page - they usually quickly review the submission and remove the false positive detection, which clears up the previously detected files in your Windows Defender.