On Tue, 20 Aug 2019, Bob Bernstein wrote: > I want to use a flash drive instead of a CD to upgrade from an > old 'current' to our latest. This is being done on an ancient > emachine amd64:
"ancient" In my experience some old systems just won't boot from USB flash disks well. In some cases, I have had to try over five different flash disks until I found one that worked. Did you get any error message or information before it reverted booting from your hard disk?