50PA4500-ZM, 50PA4510-ZG, 50PA4520-ZJ (CHASSIS:PD23A) - LG TV Service Manual (repair manual). Page 45

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1
Currently installed programs 
Check the LG Pentouch Multi-touch Driver or Pentouch TV
2
Check USB Dongle Driver in Device Manager
-LG Pentouch Multi-touch Driver(MultiTouch)
-LG Pentouch Multi-touch Driver(BUS)
-LG Pentouch Multi-touch Driver(Dongle) 
the Dongle Driver should be displayed when connected USB Dongle
7-1. Pen touch overview. (Check the installation status.)
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