Hm, you have an issue to use the W2 on a windows 10 PC or Notebook ? That is strange because on my notebook it works immediately and in the device driver section of the OS I can even see that the used Audio driver is a L&P W2 driver.
If you use W10 then i suggest you de-install all the Audio drivers that you used with W2 so far and basically just plugging in the W2 should automatically install the right driver that works with your device. The latest OS of W2 is V1.0.1.3 and since all of them who were sold are "still fresh from production" I am almost sure that is the version that you have on your dongle.
I do have my notebook connected to a separate screen via HDMI and the screen also has loudspeakers and HDMI can play audio - so maybe you also need to check on which output you are going to play your sounds - because the PC or Notebook may use the other output and then you don't hear anything on the W2 of course...
It's this little symbol that you need to right-click on your mouse to open the sound settings and there on the top you choose the output source... If it says (like in the screenshot below Realtek something - it is NOT sending the Audio signal to the W2. But if you select the other one Speaker (LuxuryPredcision UAC) then you are IN.
Maybe you already anyway know all that - so don't take me wrong to have explained all that so in detail