I would be grateful if you can answer my last post.
Since then, I have done 3 things: I installed the Infrared driver which, as anticipated in my last post, has removed the Yellow flagged 'Unknown device'. I reinstalled the GFX 36.15.0.1073 driver. Dev Mgr now reports under Display adapters: "Intel Atom CPU E3800 Series Celeron CPU N2920/J1900" so I guess that problem resolved.
Lastly, I could not find an entry in Device Manager for the USB 3 Driver, so tried installing the unzipped USB3_Win7_3.0.0.33.zip again. However, all that happened was I got the UAC prompt, and when I clicked Yes, nothing happened. Still get the yellow flagged 'USB Controller'.
So only 2 issues resolved from the list I put to you on 3 September. I don't want to trust using the miniPC for work until confident the build is sound, so gratefull if you can advise on resolving the outstanding issues.