Driver download link: HP Deskjet 6940dt Color Inkjet Printer Driver
Hi, On the driver installation, you may want to try: 1. Boot your PC without the printer connected; 2. go to Start, Printers & Faxes; 3. Uninstall all instances of your printer (might be 2); 4.Shutdown; 5. Connect your printer and power up the printer and the PC; 6. Allow Windows to autodetect and auto-install. On the number of pager per minute printing, 36 ppm black, 27 ppm color are only possible in Fast Draft mode according to HP printer Data sheet. Hope this be of some help/idea. Good luck and kind regards.
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