Select “The printer that I want isn't listed” if Windows fails to auto-discover it.
Ensure that your computer and the printer are connected to the exact same network subnet. Check if your firewall or antivirus is blocking communication over printer ports. Canon Ir C5235i Printer Driver Download
Click the button (often designated by a + icon). Select “The printer that I want isn't listed”
Select "Standard" to search for printers on the network automatically, or "Custom" if you want to manually enter the printer’s IP address. Click "Next". Click the button (often designated by a + icon)
For the most secure and up-to-date files, users should always use the Official Canon imageRUNNER ADVANCE C5235i Support Page rather than third-party sites to avoid potential malware. Canon-iR-ADV Driver Download and Installation [Windows]
Choose your language, accept the license agreement, and select "Standard Installation."
What (Windows or Mac) are you currently using?