I've updated Post 2 to include installed/testing/working screenshot of WinMail on Windows 10 Enterprise v1809 LTSC
Good Morning Krum,
Don't feel stupid or less-than for anything. You have more computer knowledge/experience than the average person.
I don't need to look at your screenshot, or your log file, or process monitor - your resolve is much easier than that so don't make things more complicated than they are, because it's very simple if you do the steps (and what's in them) correctly - it will work and in the end you will smile at yourself for what it will turn out to be a simple easy thing you've missed - I've seen this scenario play out more than a thousand times. Instead of spending all the time and effort to explain all of what you did, instead put that effort into whatever the smallest detail is that you missed in the instructions.
Mostly over the years for x64 users, people use the wrong programs folder (Programs Folder (x86)) ..as already explained in the steps; or, they do it right, but then shortcut from the wrong folders WinMail.exe, or they mix up the attachments labels using the wrong files for the wrong place, or use the wrong x86 or x64 version of the files. All of this is mentioned in the notes.
Do nOt extract any zip directly to the targets, extract them Before you get there is the best practice - because, I've seen what many people will do, will extract to a folder within its same name folder (instead of extract here) ..and so therefore you end up with doubled nested/named folders - and of course then you'll lose your true file/folder location targets.
It's going to end up you did something like that, and you'll just smile when you realize the logic of it, where in hindsight of course where everything is understandable. Don't anyone be hard on yourself about it - just smile instead and be happy!
That's why I say this procedure is only really for advanced computer users who already get all these little computer nuances.
I can see Krum that you are already an experienced computer user, just don't overthink it.
...to overwrite c:\Program Files\Windows Mail\msoe.dll
Yes for 1709+ post #2 users, you will end up placing that file twice overwriting it - that is just the timeline of how things happened, just follow the directions in order and do as it says. Tested/Proven/Working hundreds of times by myself, and by thousands of users.
Each person should download all the files you need and make yourself your own customized instructions for your own particular setup. Each persons will be a little different depending on what you have. I do that myself, when I do a fresh OS install for instance like last night, I have a dozen folders on a separate usb stick (or separate connected HD) for each thing to do in order, and I name them, and then prefix that name from 1 to 10. ..and then each time I install a new OS I will do them all in order (and within those folders of course are ones for WinMail) ..and each folder has everything I need (files and notes) ...and I just methodically go down the list. I install new OS's all the time and even for me makes it so much easier to have them in order how/what/when to do them, and it makes for much better accuracy from one time to the next. For Win10 1709+ users, you can even can combine appropriate things in one task; iow, for instance the final msoe.dll already placed in the first programs folder you are placing, etc, things like that, but please don't even bother with any consolodation until you can do it right at least once, first! <g>
__________________
edited later - to answer your questions:
there is such file there because of the point 4, right? /
Yes, but just do what it is asking
(it's like that only because of the timeline of how it happened, and updates came afterwards, and so you replace it again)
I did not copy \Update_5-2018\x86 msoe.dll\msoe.dll to c:\Program Files (x86)\Windows Mail
You wrote this in two places but it does not make sense to me the way it's written: "msoe.dll\msoe.dll" ?
..also, naturally the x86 msoe.dll in that update is Only for Win10 x86 version OS and has nothing to do with x64 OS, as mentioned in tutorial x64 users don't touch the ''Programs Folder (x86)'' folder in any way.
I'm trying to read and understand your instructions of what you did, it's confusing sorry, and why write it again, it's already written on the tutorial of what to do. Maybe it's just a language misunderstanding nuance, but things are complicated enough without making them more complicated <g> I know I know, you are just trying to be accurate.
One last thought, be sure the .iso you used was not already prepared with NTLite (if even possible) ..I was just thinking of what Saaglem posted and why you do not have WinMail listed in yours when you load it. (no I never tried NTLite I'm just guessing is all)
Have you personally ever had WinMail working (besides Win7) ..on any version of Win8 or Win10 yet?