Canon UFR II User Manual page 24

Installing the Driver
[Wake any printers that are in sleep mode and search]: Select this when you want to detect devices on the
network that are in sleep mode.
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If the following screen is displayed, select [Add new printers] → click [Next].
[Add new printers and update existing printer drivers]: Select this when you want to update already installed
drivers at the same time that you add a new driver.
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