I have the same problem ( I think). I have the TX1 POS system. Uses the 620 G1 Pro tablet and A798 thermal reciept printer. New out of the box it came with Windows 8. I upgraded to Windows 10. The A798 reciept printer shows up as an unspecified device instead of a printer. Need to find the correct driver. Call the HP support guys in India and they knew less about the system then I do. HELP. I am going to open my doors for business in a week and I need this POS system to work.
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