NK823x Modbus Client is a software product for Windows developed by Siemens S.p.a. Settore BT FSP-DMS
It is reported that the following Windows processes are part of NK823x Modbus Client:
If you want to remove NK823x Modbus Client from your computer, just go to Start > Control Panel > Add/Remove programs and select NK823x Modbus Client from the list of programs.