To fix the "Could not install Canon MF port monitor" error, you generally need to clear out stuck installation files and use the official "UFR II" driver bundle rather than letting Windows handle it automatically. Quick Fix Steps
The error "Could not install Canon MF Port Monitor" typically indicates a communication failure between the installer and the Windows Print Spooler or a conflict with existing security settings and registry entries . Primary Causes
You’ve just unboxed your Canon multifunction printer (MF series), run the setup CD or downloaded the driver from Canon’s website, and everything seems fine… until you see it: could not install canon mf port monitor
Fixed for me after running the installer in Safe Mode with driver signature enforcement disabled.
The Print Spooler manages all print jobs and driver installations. Restarting it can clear up locked files. Press Windows Key + R, type services.msc, and press Enter. Scroll down and find the Print Spooler service. Right-click Print Spooler and select Stop. Wait a few seconds, right-click it again, and select Start. Ensure the Startup type is set to Automatic. Step 4: Temporarily Disable Antivirus and Firewall To fix the "Could not install Canon MF
Could not install the printer driver. Try to inst... - Canon Community
Navigate to Settings > Bluetooth & devices > Printers & scanners. Look for the Print server properties section. Here’s the Fix You’ve just unboxed your Canon
If USB installation fails, try a network installation (or vice versa).
Step 4: Delete driver store files