MBR2GPT Disk layout validation failed

macsrweI'm not sure if I understand you, but as far as upgrading Windows, you'll be able to upgrade to 12, if and when that is a stable OS.
I have 11 installed on another drive, but I don't use anything over there. I have my E-mail client set up there, but that's about all. I do not send or receive E-mail on 11, but I have a couple of programs installed that provide enough feedback for me to see whether 11 is stable or not. My E-mail client is one of them because it's got E-mail back as far as 1999. That software alone tasks the operating system. If it runs really well, then that's one of many tests to prove if 11 is stable enough for me to switch.
I'm still running and using 10 and have no reason to move to 11.
Microsoft knows that 11 is a "Corvair"...cool to look at, but it was a real POS mechanically.

Maybe I made an assumption I shouldn't have. I downloaded Windows 11 as opposed to just using Windows 10 to upgrade. That's why I have Windows 11 on another drive.

So I'll use 10 until 12 is stable. I'm guessing to make 11 stable (even though they say it's stable now, it's not) would mean taking it down to the core. Instead, they decided to start over with something else - 12...hopefully.

But Windows 10 will be around for several more years. If you'd like to read a quick-read post, check this page - https://www.techadvisor.com/article/745965/will-there-be-a-windows-12.html

And for me, I don't need more bells and whistles. So if 11 doesn't have anything added to it, and 12 doesn't come out with any new features, I'm also good with that. As that article states, it's very likely that you'll be able to upgrade from Windows 10 to Windows 12.

Nobody is "required" to switch to Windows 11. Windows 10 will be supported for several more years.

My entire point for now is that because Windows 11 is "not" stable enough for those of us using the computer all day long, I refuse to use 11. Flickering; lagging; etc., are critical usage problems. I develop Web sites all day long, provide weekly meetings on SEO with zoom and Streamyard, edit videos of the meetings to upload to YouTube, and that's only part of my days.

So yes. It's critical to me that my operating system be "rock-solid-stable". Windows 11 does not meet that tier - yet - and may never. If it does, and I check on it every couple of weeks, then I'll switch. But I believe Windows 12 will be released before that happens. Hence the reason 12 was even mentioned anywhere.

If you are thinking that migration is going to be an issue for you, that part I don't understand. Migrating anything has the chance of "something" going wrong.

Whatever software I need, I "install" into the current operating system I'm using. I do not migrate anything. If you are using software for which you no longer have the installation files, then you would need to migrate. Although I don't see the logic in why people don't retain full installation files or disks for their software. Or, go to the company where they "got" (e.g. purchased; downloaded for free; etc.) the software and install the latest version from there.

Any files you have generated from software that you'd consider the need to migrate is a simple resolve. Whatever you created is stored somewhere you decided.

I keep all of my files that I generate on a separate drive from C:\

C:\ should only be used for installing software and storing operating system software as well as data.

So I "have" everything to move to another drive - after I install the latest version of the software I simply look in my drive where I have all my generated files to open something.

I've been working on PC's since 1992 - before there was an Internet and before Windows was available. I have never migrated anything.

If you do want something that is a quality tool, I would recommend Acronis. I've used it in the past and been happy. You can back up your entire drive, exactly as it is now, and use the file to which everything was backed up to literally install on another drive.

If I were to decide Windows 11 were finally stable, yes...I'd be working a couple of days to install all my software from the drive with Windows 10.

I don't care what migration software is available. You get a better install if you literally install the software you need.

But we won't know until 12 is released whether it can upgraded from 10 or not. I'll cross that bridge when I get there. I just refuse to use Windows 11 until it's no longer got all those "quirks" - however I have to upgrade in the future.

I'm hoping you see that I'm trying to understand why it's important for you to have Windows 11, and provide alternatives for you at the same time.
Bottom line is, I'm hoping you understand you don't need to keep beating your head against the wall to get 11 installed on your computer. If it's one of those, "I just need to do this because I started, and I "have" to finish this...", that's simply an exercise in futility - but knock yourself out.