Thanks, Bryce! However, I'm getting a nastygram from Canon saying:
"PIXMA MG5420 has been retired. Product support is no longer available. Driver and content updates are not being made."
My PIXMA MG5420 was working perfectly when I still had W10. Is this Canon's way of coercing W10 people into buying new products from them?
If so, that is a real trump-dictator-level crappy thing to do to us. I'll try contacting Canon tomorrow. If they're going to dig in on this, I'll never buy a single Canon product again. Epson has some fine printer/scanner/copier units to buy.