Your printer is visible in network share (network computer, NAS…), but you are unable to install the printer due to the following error:

Windows cannot connect
Print processor does not exist

This subsequently causes issues with document conversion.


  • Windows 10 (2018 October update)
  • Synology NAS
  • an old USB-only printer connected to Synology NAS with printer sharing enabled
  • basic driver downloaded from manufacturer website and unzipped to folder (.inf and .cab files)

The printer was HP DesignJet T610 44in, currently unsupported by HP. The inf file says: „HP Designjet Z110x series driver INF file for Windows XP and Windows Server 2003 64-Bit Edition“.


Basically, you have to use a different way to add your printer to the system. See the video carefully: