J6450 installed on wireless network with two HP laptops running Windows 7 Professional 64-bit. One prints fine. The other (HP Folio-13) regularly prints "static" data (both B/W and color) in vertical sections, but not continuous vertical lines. Believe it is a driver problem -- i.e. newer driver sending "PCL-6" data to printer when J6450 needs "PCL-4" or "PCL-5". Does this make sense? If so, how do I confirm and replace the driver? How do I compare the drivers on the two laptops? If different, can I simply copy the "good" one and paste it into the correct folder on the laptop with the problem?
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