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It just runs the normal setup up to formatting drive, doesn't offer the choice at all. Even redownloaded the ISO and tried it from the second setup.exe, from on a drive folder, etc. No luck. Kind of odd. Maybe the key or something if they updated the one to be used? Idk
How many years ago did msft now stopped supporting upgrades from boot? For upgrading, mount the ISO and run setup.exe from the ISO.
Things to check. Enough space on disk to store 2 installations, one current and the previous one. Run disk cleanup and remove any previous installation before upgrading. Do not use customisation not supported by Microsoft, unless you are absolutely certain that you understand each detail. Upgrade with the switch not to create recovery partition. First clean install is more reliable if it does not have Service Partition and the boot files and recovery files are stored on the C drive. I am referring here to BIOS installation, which is the other thing. Avoid UEFI and enhanced security.
In all scenarios it won't offer the option to upgrade by itself, upgrade needs to be started manually, if it's not possible/working, setup will show an error.
I suppose you are right, however we might not know what "innovation" Microsoft decided to introduce in newer releases, especially that they are not official releases.
As I said, that wasn't what I tried. I did it from a mounted iso and then an extracted iso - my usual way, as I've always done with these builds, as I've done successfully for a good decade or so. I've been doing this kind of thing since 2003... Regardless; Extracted, or mounted, setup - either exe - for some reason skips over the options entirely. They are never shown. It goes to the screen for choosing what partition to install it on. I know when it should show up. It isn't doing so. On a base install of the prior build, with zero custom s**t or options being used. It just isn't showing.
Then tell us what you actually are doing, i showed here all is working as expected and intended: https://forums.mydigitallife.net/th...-techbench-only-atm.83200/page-2#post-1650739
You've edited your post but still not making clear what you're doing/experiencing. This will never happen when upgrading aka running setup from a mounted ISO on a running install. What base install?