Why is my computer saying my Canon printer is offline?
Default settings issue: Wrong default printer settings may be the reason due to which your Canon printer goes offline. Therefore you need to make sure that your printer is selected as ‘Default Printer’. Use Printer Offline Enable – Offline Status option not disabled that’s why printer may be goes in offline state.
How do I fix my Canon printer offline Windows 10?
Select Start > Settings > Devices > Printers & scanners. Then select your printer > Open queue. Under Printer, make sure Use Printer Offline is not selected.