On 16-Jun-2018 5:00 pm, Nil wrote:
On 15 Jun 2018, Monty wrote in
alt.comp.os.windows-10:

In regard to your query, I have the same software on my PC and I
can open i_view.ini in Notepad without any problem.
I've opened that INI file on several different computers and with
several different text editors/viewers and nothing acts out of the
ordinary. Irfanview does caution you, via a comment in the file, that
the INI file is Unicode encoded, but otherwise it's straight text, no
binary information in there. I'd say there's something peculiar about
his system, that it's not a general Windows 10 issue.

Yes. I think you're right.

Since my original post I've found another Windows 10 computer with
Irfanview and the .ini file on that reads perfectly ok. I've also used
several other text readers with consistent results so it's nothing to do
with Notepad.

Thanks everyone for all the other helpful information. It's really
useful as I'll need to try to work out why this particular Windows 10
computer exhibits this strange behaviour.