https://devzone.nordicsemi.com/f/nordic-q-a/12219/no-recogniztionSo I just received my nRF51 dk. When I plug it into the USB port, the device starts to blink but is not showing up as standard USB drive? Any suggestions? Gabrielen-USTelligent Community 13Tue, 01 Mar 2016 07:58:42 GMThttps://devzone.nordicsemi.com/thread/46229?ContentTypeID=1Tue, 01 Mar 2016 07:58:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d9dfa358-d1d1-49a1-bfab-4407ee31adc5endnode<p>Hi Gabriel, install nRFTools or other SW package from Nordic first. If it persists then try to find manually driver in the list of available devices on your machine (assuming you are using Windows but you question would make little sense otherwise...;) and pick &quot;mbed Composite Device&quot;, this works for me on Win7. Cheers Jan</p><div style="clear:both;"></div>