ok I now have an EV3 connected to my Windows 8.1 laptop. If you open up the control panel then choose "network and internet" you should be able to open up the network and sharing centre. From there on the left hand side you can click on "change adapter settings". In this window without the EV3 connected do you any device called something like "Local area connection" with sub text of "USB Ethernet/RNDIS gadget"?
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