And just to let you know: in all this time I've been posting messages here in this thread/ forum, I've also been submitting Support Tickets to Cyberlink Tech Support. I don't mean back on November 4, 2017 when I originally started this thread; I mean more recently, when it was getting closer to Christmas.
And.....I have to say.....they're not always so forthcoming with their responses. On my initial contact/ submission of a Support Ticket, it took 10 (ten) day before I received a reply. And even then, it was like a "form letter" of a reply, as if it were a standard, generic response, a "Copy/ Paste" of some form they keep handy. I'm pretty sure that just about any company that offers tech support get all kinds of submissions from customers, and these customers have varying degrees of technical know-how. Me? Yes, I know how to word a support ticket, I give explicit detail and don't gloss over things, don't speak in generalities.
As my Support Ticket with them started to go back-and-forth, some of the replies started to get a little better; not a whole lot better, but somewhat better. It's almost like they don't know their own product inside & out and can't support it properly; coming here to these message forums sometimes garners me more informative answers than the support tickets.
OK, so here's where I am at:
I didn't really want to do this, but another thing I tried was to completely remove my EVGA Nvidia graphics card from my system: Yes, disconnected its 8-pin power connector, removed the Display Port cable, then removed the card from its PCI-e slot. This way, ONLY the on-board Intel HD graphics were there. Tried the 4K disc of Star Trek (2009) again.....and it failed; same error message as before (as in that pic from my previous post).
NOTE: In my most recent update with my Support Ticket with Cyberlink, I included a screenshot picture of that error message/ error number, so, if they truly know their software programs' product's specs, that error number should be able to tell them something....and then maybe they'll be able to tell ME something.
And bear_in_mnd: I ended up going to Bestbuy and got a Rocketfish HDMI cable; yes, they're way too expensive. But, it appears like a rock-solid, superduper HDMI cable, but guess what? I tried it aaaaannnnnddddd.....still won't play the 4K disc; same error message.
triffid: I did as you suggested and went back to the 21.20.16.4664 drivers; it didn't work.
I also took your other suggestion and went and downloaded/ installed the HDMI 2.0 FW update for my Aorus motherboard; it didn't work. I even did system reboots after all of these things, just to make sure.
Know what I even tried, just in-case there was a glitch on the original install? I un-installed then re-installed the Cyberlink Media Suite 10 software that came with the Pioneer drive; that didn't do the trick, either.
The last thing I've done (or, should I say, is "in the process") is to contact LG Tech Support regarding my monitor. I submitted a support ticket with them asking if my model of monitor is compliant with HDCP 2.2
It seems like the only thing that's holding me back is completing the "handshake" with HDCP 2.2 (according to the CyberLink Ultra HD Blu-ray Advisor). I'm pretty sure it's not on the GPU end (Intel HD graphics), and it's not the HDMI cable itself (I've tried three HDMI cables at this point, with the most recent one being the superduper Rocketfish HDMI cable), so I can only think that it's on the receiving end of the monitor itself.
When I hear back from LG Tech Support, I'll post back and let you know.
This shouldn't be this hard.....uggghhh.
Pez