Bob, I had to start a new thread because the option to reply is no longer showing at the original thread.
Your last reply wasn’t to any post of mine. If you’ll look, you’ll see that someone else posted that bit about a DVD and that it’s actually a word for word quote of something I’d written earlier. I have no idea what this person wants.
At any rate, I point you to post #4037760 in that thread, where I make clear that I’m not asking how to make a DVD that already has files on it bootable. But we’ve covered all that.
I looked at the link you sent me. As far as I can tell, it doesn’t offer any new repair options. It just provides the convenience of having the equivalent of a number of repair DVDs in one environment. I have Hiren’s and several others, but I don’t believe any repair program can figure out what my bizarre problem is, let alone fix it.
Approaching the problem from another angle, I’m astounded that the black screen remained even after restoring from a backup that predated the update that introduced the black screen. I even tried deleting the Windows 11 partition, creating a partition in that space, and restoring from a backup. Yet the black screen persisted. That should have been impossible.
Does that get you thinking in new directions?