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Real-time antivirus (McAfee, Norton, Avast, Bitdefender) or Windows Defender can falsely flag the port monitor installer as suspicious because it attempts to inject a driver into the system kernel.
Before you start the more involved solutions, try these quick checks first. Sometimes the fix is simpler than you think.
Sometimes Windows services interfere. Restart your PC, press (or Shift + Restart → Troubleshoot → Advanced Options → Startup Settings → Safe Mode with Networking). Run the installer there. could not install canon mf port monitor
Conflicts from old drivers can prevent new ones from installing. Disconnect the USB cable (if applicable). Go to .
The error message "" typically occurs when Windows security settings, registry conflicts, or existing driver remnants block the creation of the specialized Canon port needed for network communication. Incident Summary Sometimes Windows services interfere
Remember to turn your firewall and antivirus back on immediately after testing. Step 5: Install the Driver Manually via Device Manager
Keep the Services window open. Press Windows Key + R again, type C:\Windows\System32\spool\PRINTERS and press . Conflicts from old drivers can prevent new ones
Click in the left sidebar.
Avoid interrupting the installer during the "Registering port monitor" phase.
Real-time antivirus (McAfee, Norton, Avast, Bitdefender) or Windows Defender can falsely flag the port monitor installer as suspicious because it attempts to inject a driver into the system kernel.
Before you start the more involved solutions, try these quick checks first. Sometimes the fix is simpler than you think.
Sometimes Windows services interfere. Restart your PC, press (or Shift + Restart → Troubleshoot → Advanced Options → Startup Settings → Safe Mode with Networking). Run the installer there.
Conflicts from old drivers can prevent new ones from installing. Disconnect the USB cable (if applicable). Go to .
The error message "" typically occurs when Windows security settings, registry conflicts, or existing driver remnants block the creation of the specialized Canon port needed for network communication. Incident Summary
Remember to turn your firewall and antivirus back on immediately after testing. Step 5: Install the Driver Manually via Device Manager
Keep the Services window open. Press Windows Key + R again, type C:\Windows\System32\spool\PRINTERS and press .
Click in the left sidebar.
Avoid interrupting the installer during the "Registering port monitor" phase.