Awesome.
1). Yep; that temperature was looking suspicious from the start. Making using of the Intel XTU and that does a decent job in itself as far as monitoring goes.
2). I rectified the wireless issue as mentioned; using driver version 17.0.0 and all is well. Still haven't got around making use of Bluetooth but we'll see what happens
3). Good to know. A little problematic sometimes when I want to change boot orders and I don't remember what key does what (a little too quick for my taste, but for most that isn't a valid complaint...)
4). So there's no need for me to turn off Super / Prefetch within Windows? It won't cause unnecessary wear-and-tear? (already disabled scheduled defrag on the OS, as well as file indexing on the drive)
So yeah. My only other niggly issue is the graphics core seemingly downclocking when idle. Fair enough, but when I come along to use it again it does lag for a good 2-3 seconds before getting back up-to-speed (point 4 on my previous post). Again, not a huge issue but it is noticeable.
All-in-all though, I bought the NUC to replace an old tower. And for what I use it for (net, media playback, bit of video decoding and photo editing to boot), all in a footprint no bigger than a CD jewel case and with it just barely sipping power. All good.
(I've been editing my last post with more questions; I'll stop doing that now to prevent confusion...)