What should I do if the machine shows a message to update the version at startup?

When a message prompting a version update appears, press [Update] to automatically update the version of the equipment. If [Skip] is selected, the update prompt will appear every time the host machine is started. In service mode (Lv. 2), you can set the machine not to display this message via Copier > Option > Fnc-Sw > Ver-Chng. (Page 8)

From the official Canon imageCLASS MF1538C Multifunction Laser Printer manual, page 8

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