If you’ve changed the Remote Desktop Port or added another Remote Desktop Listening Port in Windows 10 and your Firewall is active you will need to manually create a rule to allow incoming connection on the new port. Here’s how to add a new TCP rule for RDP in the Windows 10 Firewall.
Open Windows Firewall. Since you’ve managed to create an RDP port using the windows registry we’ll assume you know how to get to the windows firewall.
With Windows Firewall open click on Advanced Settings. The Windows Firewall Advanced windows will open.
Click on Inbound Rules in the left pane and then click on New Rule in the right pane
Check the Port radio and then click on next
Leaving the TCP radio checked type in the port number you changed or added for the RDP listening port. Click on Next
Make sure Allow the connection is selected and click on Next
Choose what networks this rule should apply to on the next page and click on Next
Give the Rule a name and click on Finish