There are two ways you can get the driver easily, and for free: If the driver gets corrupted or missing, you’re likely to run into printer issues, such as error code messages, blank printing, etc.So, it’s essential that you have the correct printer driver at all times. The Canon MF8500C driver program runs on your operating system, and enables it to communicate with the printer you use. If you’re using a Canon MF8500C series printer, you’ll need to install the correct driver on your PC to keep it functions properly.