Practical steps:
A stuck print spooler can block new port monitors from registering. could not install canon mf port monitor
Antivirus packages or aggressive Microsoft Defender rules flag the custom network monitor as a security threat. Practical steps: A stuck print spooler can block
If you are contacting IT support or Canon support, confirm you have done the following: could not install canon mf port monitor
Corrupt system files can prevent driver installation.