I am having the same problem on a users windows 7 machine. No matter what I try, it prints duplex. I have deselected the duplex options, in the properties of the printer. I have unistalled the duplex option from the printer properties and it still prints on both sides of the paper. Have reinstalled the drivers three times, nothing changes. Used the drivers that are on the printer, and downloaded them from HP, still no change. Tried checking the the two sided printing option to cause it to be manual, still no change. No matter what I try, this printer prints duplex. This is an HP M451dn color printer. Any suggestions would be helpful. If there is any additional information that you need from me, let me know,.
↧