I have an HP Laser Jet 2015d with a duplex feature that is not recognized by the default Windows 7 driver. It indicates a manual process for duplex printing. I have the original disk, but it will not work in Windows 7. Tried to load the driver from HP, but can't determine the folder for the actual driver. Can anyone please help?
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You may need to configure the driver so that it knows that a duplex unit is present on the device (assuming that one is present and physically working).
On the Printer properties dialogue, select the Device settings tab, and ensure that the duplex unit is set to Installed, rather than Not installed.