Well, now I can report that the latest PREVIEW update KB5030300
for Windows 10 repeats the same problem of not being able to create a working Rescue Media using WinRE 10. The error message about a missing NTOSKERNEL.exe is the same when you boot the RM, including the error code 0xC000A004.
I tried uninstalling KB5030300 once, and it worked - I was able to create the WRBM version and the USB Flash version of Rescue Media.
Then, just to be sure, I let Windows Update install the PREVIEW again, and it failed in the same way. This time, I tried restoring the Recovery Partition from the backup rather than C:\ and Recovery Volumes. Didn't fix it.
So I restored all paritions on the System Disk from a backup created the same day at 00:30. All traces of the problem are gone. And I'm leaving it that way -- with the preview patch now waiting for approval to install it from Windows Update. I haven't looked, but I'm sure it will be pending as an optional patch on my 2 other Windows 10 systems. I'll have to be alert for it showing up as a non-preview update. @JoeA
Please advise the team that worked on the earlier ticket. I'm not going to reopen it or a new ticket. I'd love to know what it is about this patch that causes bad RM builds by Reflect.
L.W. (Dan) Danz, Overland Park KS Reflect v8.1.7638+ on Windows 11 Home 23H2 22631.2715+
Reflect v8.1.7638+ on Windows 10 Pro 22H2 19045.3570+
Reflect v8.1.7638+ on Windows 10 Home 22H2 19045.3570+