USB 8 Relay BOX
Download Drivers from:
https://info.kmtronic.com/software/USB_Relays/Driver_KMtronic_USB8relays_BOX_CDC.zip
UnZip in a separate folder ( in example D:\Driver_KMtronic_USB8relays_BOX_CDC )
Open Device Manager
Connect the board to PC
You will see USB CDC COM under "Other devices"
Click on USB CDC COM and next Update Driver...
Click on Browse my computer ...
Locate driver’s holder and click Next
Click on Install this driver ...
Wait until Windows install the driver
Windows will show confirmation message that drivers are installed
Close and open again Device Manager to check that USB COM is now installed
Windows 8
http://dangerismymiddlename.com/archives/8913
http://www.technipages.com/windows-8-disable-driver-signing.html
