Thanks, Leo
Right click drag & drop not working sounds exactly like what I've been noticing.
But I'm beginning to think it might be a software conflict with Faronics Deepfreeze if not completely on Deepfreeze. I just had to make some permanent changes, and restarted in a thawed state.
And now things seem to be working fine at the moment.
I am aware that the Deepfreeze has caused issues with windows sticking on top. It has happened on my machine and on a friend's system I recommended Deepfreeze who doesn't run Directory Opus. I have created tickets with Faronics over this issue in the past.
Or maybe it's as simple as a restart fixing a Windows tantrum.
I'll keep an eye out if it acts up again, and try to get a better sense of some context and what may be instigating it. If/when it pops up again, I do some more thorough testing based on some of the questions discussed in the thread you referenced.
Very strange. Just to declare some details...
Directory Opus: 12.10B6853
Windows 10 Enterprise
Version 1709
OS Build 16299.125
Faronics Deepfreeze Standard 8.53.020.5458
Appreciate your time and support, Leo!