If you receive:

Unable to change to the specified driver. Original settings will be restored.

when attempting to change the driver on the Properties / Genral tab of a network printer, you may have to adjust the registry. If you print a test page and close the printer's Properties, you may also receive:

Printer settings could not be saved. The printer driver is unknown.

Use Regedt32 to navigate to:

HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Print/Providers

Double click the Order value name in the right hand pane and move
Lanman Print Services to the top of the list.