When prompted for the driver, click , browse to the folder where you extracted the Canon driver files, select the .inf file, and complete the wizard. Step 5: Disable Third-Party Antivirus and Firewalls
Aggressive firewalls or antivirus software (like McAfee, Norton, or Bitdefender) can flag the creation of a "Port Monitor" as suspicious activity. Disable your antivirus "Live Protection" for 10 minutes. Run the Canon installer. Re-enable your protection immediately after. 6. Check for Windows Update Conflicts
Canon provides multiple driver types (PCL6, PS3, UFRII). The UFRII driver is Canon’s proprietary architecture and typically offers the most stable performance for multi-function (MF) units.
If the driver uninstallation fails, you may need to manually remove the port. Open and select Devices and Printers .
The Windows Print Spooler service is frozen or hanging up on a stuck print job. could not install canon mf port monitor
By following these steps, you should be able to resolve the Canon MF port monitor installation error and get your printer working again. If you'd like, I can help you:
Press , type printui /s /t2 , and press Enter . This opens the Print Server Properties. Look for any listed Canon drivers.
If you previously owned a Canon printer, or if a past installation failed halfway through, corrupted files will block the new port monitor from installing. Part A: Remove via Control Panel Open the and click on Programs and Features .
This is the most reliable method for resolving persistent driver conflicts. When prompted for the driver, click , browse
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
Visit the official Canon Community Forums or consult Canon’s "MF Driver Installation Guide" specific to your model (e.g., MF260, MF4800, MF730).
Corrupt system files can prevent driver installation.
Method 4: Use the Official Canon Uninstallation Tool (DelDrv) Run the Canon installer
This comprehensive guide explains exactly what the Canon MF Port Monitor is, why this error occurs, and—most importantly—how to fix it permanently.
for your exact Canon model.
If the installer cannot register the file, you can do it manually.
Before you start the more involved solutions, try these quick checks first. Sometimes the fix is simpler than you think.