: Ensure you are running the driver installer by right-clicking it and selecting Run as administrator .

Previous failed or incomplete installations can leave behind "orphaned" port entries that the new installer cannot overwrite or re-create. Windows Protected Print Mode (WPP):

Right-click the specific Canon port monitor folder and select . Close the Registry Editor. Restart your computer. Step 5: Disable Antivirus and Firewall Temporarily

Disconnect the printer's USB cable from your computer (if applicable). Press Windows Key + R to open the Run dialog box.

Look under the section for the Generic Plus PCL6 Printer Driver .

Locate any instances of your Canon printer, right-click them, and select . 2. Delete Stubborn Drivers and Ports

Windows may prevent the installer from creating the necessary registry keys for the port monitor, even if you are logged in as an administrator.

Locate any entries for or Canon MF Scan Utility , right-click, and select Uninstall .

If these general solutions don't resolve your issue, I recommend checking the following resources:

This frustrating issue frequently appears on Windows 11 and Windows 10 machines, especially after major feature updates. When this happens, Windows may default to a basic driver that lets you print, but your scanner functions remain completely broken, and native tools like the fail to load.