What should I do if the MF1538C displays a message prompting a version update?
Press [Update] to automatically update the version of the equipment. If [Skip] is selected, the version update prompt will appear every time the host machine is started. It is also possible to disable this message via service mode at Copier > Option > Fnc-Sw > Ver-Chng. (Page 8)
From the official Canon imageCLASS MF1538C Multifunction Laser Printer manual, page 8
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