Can't get UEFI drive to boot - Chapter 2

thornev said:

@NavyLCDR - How did you get the partitions populated on the clean disk in post 96?

You said don't mess with Recovery partitions, but how did you get the one in your illustration?

I booted from a Windows 10 USB flash drive and did a normal clean install to a blank disk. On my own computers, I delete recovery partitions.

Megahertz said:

I thought the same thing.

I always suggest to run mbr2gpt on a winpe. Under windows many things can prevent the conversion (like antivirus)

Same mbr2gpt run from WinPE (Shift + F10 from Windows Setup):

AddRAM said:

why did you ever give your System Reserved partition the letter Z ?
In doing so, files were written to it and it grew in size.

@AddRAM -
I needed to do something to the partition in DISKPART and I couldn't without assigning a letter. Are you saying I should remove any and all letters on System partitions?

And what files would have been written to it?

AddRAM said:

What is your purpose in doing this project ?
To convert a MBR/Legacy install of W10 to a GPT/UEFI install of W10 ?

Besides having some fun with Windows, I want to see what the performance benefit is about which I read (haven't done enough with it yet to make a judgement) and get ready for Windows 11. I'm not going to be an early installer, but it's a step in that direction. So yeah, I want to migrate my current, daily running environment from legacy to UEFI (though as a last resort I'm willing to install a new Windows 10 and reinstall my most critical apps).

980...Wow! I have 860 and 970 installed now.

I've done clean reinstalls before. I never regretted them. Windows gets bogged down after a while and the improved performance one gets back with a clean reinstall is enjoyable. It's not a bad idea actually for this project. I just have to ensure that apps with critical data are built so that the external data is portable across app reinstalls. I would have to slap my wrist if I ever agreed to use an app that doesn't make its data portable if that data is critical for me.