Unplug the printer's USB cable from your computer (if using a wired connection). Open the and go to Programs and Features .
Once installed successfully, re-enable your antivirus software immediately. Conclusion
On stricter systems, unsigned or improperly signed components will be blocked. Group Policy or Windows Defender settings may prevent installation of third-party port monitors. could not install canon mf port monitor
The port monitor handles:
Return to the Services window, right-click , and select Start . Attempt to run the Canon installer again. Method 3: Clear Residual Canon Port Monitors via Registry Unplug the printer's USB cable from your computer
Select and click Next . Set Device type to TCP/IP Device .
Turn your security software back on immediately after the installation finishes. Summary Troubleshooting Checklist Target Issue Run as Administrator Privilege blocks 2 Reset Print Spooler Stalled print queue data 3 Clean Print Management Corrupt leftover ports 4 Adjust Registry Permissions Write access restrictions 5 Device Manager Update Faulty .exe package installers Attempt to run the Canon installer again
Re-enable your antivirus and firewall immediately after the installation finishes. 6. Use the Standard TCP/IP Port Workaround
Click , browse to the folder where you extracted the Canon driver files, select the .inf configuration file, and complete the wizard. 6. Run the Deployment Clean Up Tool (CNMNRE.EXE)
Ensure that the Canon MF Scan Utility is allowed through your firewall if you are using it on a network.