I genuinely appreciate your efforts and understand that dealing with ongoing challenges can be disheartening, especially after you attempt to resolve them, @drew1. It is concerning to learn that while the server restart addressed one issue, similar problems continue in other areas. I will share some information and recommendations to help you fix these problems so you can get back to work without any more delays.
 

After replacing your workstation, one possible cause of the connectivity problems could be related to the firewall settings. Specifically, it seems that the rules for the Point of Sale (POS) applications may not be correctly configured to allow traffic through the firewall.
 

To troubleshoot this issue, I recommend temporarily disabling the firewall on the server. This will help determine if the firewall is the source of the problem.
 

If turning off the firewall solves the connection problems, it's important to reach out to an IT expert. They can help you turn on the necessary Network Sharing settings for the Private Network and fix any other connection issues arising from switching to new workstations.
 

I'll keep this thread open just for you, so feel free to tag me anytime you have follow-up questions or need clarification about the POS system. I'm here to support you, and our main goal is to ensure that you can run your business smoothly and without any hassles.