Dealing with the "Driver Is Unavailable For Canon Printer" error on a Windows computer can be frustrating, but there are steps you can take to fix it. One possible cause of the error is an outdated driver, so the first thing to try is updating the driver. You can do this by going to the Canon website and downloading the latest driver for your printer model.

If updating the driver doesn't work, there may be corrupted system files causing the error. In this case, you can try running a System File Checker scan. To do this, open the Command Prompt as administrator and type in "sfc /scannow". This will scan your system files and repair any that are corrupted.

Another option is to uninstall and reinstall the printer driver. To do this, go to the Device Manager in the Control Panel, locate your printer, right-click it and select "Uninstall device". Then, restart your computer and reinstall the driver either from the Canon website or using the original installation CD that came with the printer.

If none of these methods resolve the issue, you may need to seek assistance from Canon customer support or a professional computer technician. They can help diagnose and fix any underlying issues that may be preventing your Canon printer from working properly.