On Fri, 9 Apr 2021 at 13:22, Stephanos <stepha...@writeme.com> wrote:

> 1) Download one of the ISO files

Fine

> 2) Make a CD bootable

What... why?

> 3) Write my BIOS upgrade file to the memory stick
> Then insert the CD into the laptop and
> a) boot the laptop into DOS
> b) Insert the memory stick and navigate to the memory stick (by trying
> all the drive letters possible: A:, B: C: D: etc)

No, won't work.

The FreeDOS 1.0 ISO is all you need. Write it to a USB key, not a CD.
Then check it boots. If it books, copy the Dell BIOS upgrade onto the
USB key. Boot, use F5 or Shift to bypass CONFIG.SYS/AUTOEXEC.BAT
completely, and run the update.

No need for an optical disk at all. Don't waste it. No external drive
needed either.

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