---
title: "I can move my mouse to the Secondary but cant interact with the desktop"
canonical: "https://support.stardock.com/space/SHC/1288044590/I%20can%20move%20my%20mouse%20to%20the%20Secondary%20but%20cant%20interact%20with%20the%20desktop"
format: markdown
---
This is almost always a firewall issue.  As a test, on ALL MP PCs, turn off any and all AV \ Firewalls including Windows native:

![image](media://c1fc64c7-1260-410a-89ca-ea70d0dee704)

After, make the connections again to see if mouse and keyboard actions are observed on any Secondary

If it works, turn the Windows firewall on, download the following file (on all MP PCs), and run the batch file:

[https://cdn.stardock.us/support/uploads/MPPortFix.zip](https://cdn.stardock.us/support/uploads/MPPortFix.zip)

That file will only work for Windows firewall.  For any third party ones, here are manual instructions:

Make sure these firewall rules are enabled:

Rule Name Port/.exe  
Multiplicity Service 30564  
Multiplicity Clipboard 30565  
Multiplicity Application (clipboard) Multipl2.EXE  
Multiplicity Audio Service 30567  
Multiplicity Remote Screen Service 30569 (For Multiplicity 3 only)  
Multiplicity Application (Remote screen control  
MPRDP64.EXE (For Multiplicity 3 only)

All ports are TCP.  The executable names above are for whitelisting the applications within a software based firewall (Windows Firewall for example). 

![image](media://aa8ac141-bb99-4173-a81c-933ee9394c43)