I had this problem since 2010 with serial scale heads connected to the pc. Usb to serial converter or not.. I use onkly SILABS device's CP2102 or the like.. I worked around it by simply allowing the driver to install and then in device manager look for the ballpoint driver under mouse/HIDA and then simply DISABLE the driver, DO NOT UNINSTALL IT simply disable it. Then when you reboot even with the driver instaled it seems windows ignores the comport as serial mouse and uses the data from the input. You will also find that if the ballpoint driver is active then that COMport is in use and sometimes returns a COM PORT not accessible... hope this helps some one out there :) Tx Ben
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