If you're using a wireless printer, it is most likely to show an offline error. You need to follow these steps to restart the printer spooler service:· Open the Task Manager by pressing Ctrl+Alt+Del. To get all kinds of solutions and support regarding Canon printers offline, you can consult “Printer IT Help”. They are adept at offering time-saving and efficient printer services at affordable prices. If it’s about your offline printer or any other issue, they’ll offer a permanent solution.