OK, the SFCFix.zip from Post #614 killed the computer. BSOD on startup, it tried to run startup repair and failed. I restored from the 5/1/2024 image, ran the Fixlist from Post #604 and the SFCFix.zip from Post #612, so we should be back to where we were. Something in this latest SFCFix.zip breaks the computer.
I'm attaching the SFCFix again which should be the same as the one in Post #613