Do use generic driver updaters. Get the file directly from Canon.
Maintaining the correct drivers allows you to utilize the D520's primary business functions: Monochrome Printing: Speeds up to 25 ppm with a resolution of 600 x 600 dpi. Auto Duplexing: Built-in two-sided printing and copying to save paper. Colour Scanning: canon imageclass d520 printer driver for windows 10 64-bit
The driver defaults to high-quality rendering. For draft documents, set (not "High") to increase pages per minute. Do use generic driver updaters