1. When there is a pending printing job
2. When the printer and printer driver are communicating

The uninstallation of the printer driver fails when there is print data in the computer such as when the printer is printing, when there is a pending printing job, or when the computer fails to acquire printer information from the printer driver.

1. Shut down the printer.
2. Go to [Start] menu - [Control Panel] - [Printers and Faxes], right click [NITTO DURA-SF-600], and select ［Cancel All Documents］.
3. Confirm all print data has been deleted, and uninstall the printer driver.

Even if there is no print data in the computer, the printer and printer driver may be communicating. In this case, uninstallation fails.

1. Shut down the printer.
2. Uninstall the printer driver.