Hello William and Christopher,
Thank you for your messages.
Could you please let us know if you have any antivirus software installed on the remote Host machines that you can't connect to (even if it's Windows Defender)? If yes, then could you please double-check if your antivirus has detected any Remote Utilities files and/or quarantined them - in this case please add the installation folder to the exception list as described
here. You can also submit the file to the antivirus vendor for a review as a part of a
false positive report - this will help to make sure that the file is not detected anymore.
In addition, perhaps,
this KB troubleshooting page might provide some useful information.
Please let us know if you have more questions.
