myDMX2 works in 1 of 2 laptops

The big questions here is what did the software say on the bottom left of the screen on the surface? did it say "Demo Mode" or did it tell you a interface name with a serial number? These two options are the differences of the hardware being detected or not. 

Thanks for the reply.  I will have to set up again to see.  Wasn't aware of such a notice.  Then again I hadnt had an issue before... there was another issue, that may have made noticing any notification, the screen display was puny, resolution scaling..  I actually used my cell phone for magnification to be able to see/read the patch details.  since I was just testing the wireless system, for what hoped would be just a few minutes, I didnt bother diving into the display scaling issue...

Ok, so I finally got my gear back after a show...  (BTW system worked fine on yet someone else's laptop)  I have set up another testing session, using a LED Mega Par as a test light, patched the DMX address/profile, plugged in the various components, dongle, waited a couple minutes, then started software.  And yes, it appears the software is still in Demo mode.  So I tried swapping out the USB cable, no difference.  Tried the second available USB port on the laptop, no difference.  However, I then tried plugging into the Hub port.  I have my Surface Book laptop on it's hub in my office, (a brick accessory that keeps Ethernet Cat5 and USBs connected, with a single charging cable to the laptop).  I tried plugging in the USB into the hub, and I got a connection and functionality.  So its down to the two USB ports on the Surface Laptop...  Any thoughts on why the loss of connection through these ports?

...a quick update.  I also tried disabling my virus protection suite.  No effect.

Hi, that sounds more like a USB port issue on your computer than an issue with our hardware. At least thats what it seems like me, and if the same cables work via a hub even more so.