Correct drivers for the Samsung touchscreen are found here: http://www.inexio.co.kr/
Hover over 'Download' and select 'Driver & SDK'. Next you will see a page containing this set of selections. For the Apex display, select the nxTCon 7.90 driver and download.
Once the driver has been downloaded to a USB drive, it can be inserted into the PC in the display. Launch the driver update from the USB drive and follow the prompts.
Review the attached user manual (click the link below)