This is a huge pain with MS Windows. The MS Windows tools often fail with no way to finish with only using MS Windows tools. The setup I wanted is not even possible with only MS tools. I had to use a live Linux ISO to make some changes. I am running MS Windows in a VM.

NOTE: One boot of a Live Linux ISO and running a few commands is all that would be needed for Linux.

Clone the VM in Libvirt Manger

Right click on the VM and click clone

Create a MS Windows recovery drive

Boot the new VM

Login to MS Windows

Create a 4GB emulated USB storage device in Libvirt Manager

Click the Start Button

Search create a recovery drive

Click the search result of the same name

I unchecked Back up system files to the recovery drive.

Finish creating the recovery drive

It actually only used 430MB, but MS’s documentation suggested 4GB

Shutdown the VM

GPT Requires Space at the End of the Storage Device and More Space at the Beginning than MBR

MS’s mbr2gpt is incapable of correcting this.

Boot a Live Linux ISO with GParted

Add empty space to the beginning and end of the storage device

I added 257MB of empty space to the beginning for the future UEFI partation

I added 1MB of empty space to the end

It took a while to move the Windows Partition 257MB to the right

Shutdown the VM

Windows Won’t Boot, Fix It

MS’s mbr2gpt also fails until this is corrected.

Boot the MS Windows recovery drive

Troubleshoot -> Command Prompt

Rewrite the Boot Sector

> bootsect /nt60 all /mbr

Add the entry into MS Windows’s Boot Menu

> bcdboot C:\windows /s C:

Shutdown the VM

Remove the Old MS Boot Menu Entry

Boot the new VM

Select the MS Windows boot menu boot entry with Volume 1

Login to MS Windows

Open CMD as Administrator

View boot menu entries

> bcdedit

Find the identifier of the old entry, not {current} or {bootmgr}

Delete the old entry

> bcdedit /delete {eb9a84dd-716a-11eb-8036-f51dc98f7c33}
The operation completed successfully.

Shutdown the VM

Convert the MBR to a GPT

Boot the MS Windows recovery drive

Troubleshoot -> Command Prompt

Check and repair the MS Windows filesystem, or mbr2gpt will surely fail

> chkdsk /F C:

Now actually run the conversion

> mbr2gpt /convert

mbr2gpt annoyting shrinks the MS Windows partition and places the UEFI partition at the end.

Shutdown the VM

Delete the Newly Created UEFI Partition and Create a New One at the Beginning

Boot a Live Linux ISO with GParted

Delete the UEFI partition

Create a new partition at the beginning with the fat32 filesystem

Resize the MS Windows filesystem and partition to fill the empty space at the end

Apply these changes

Now set the esp and boot flags for the newly created UEFI partition

Shutdown the VM

Recreate the UEFI data in the filesystem of the UEFI partition

Boot the MS Windows recovery drive

Troubleshoot -> Command Prompt

List disk volumes

> diskpart
DISKPART> select disk 0
DISKPART> list volume

You will see the UEFI partition’s filesystem is now mounted

Mount the filesystem

DISKPART> select volume 2
DISKPART> assign letter Z:

Write the data to the UEFI partition’s filesystem

> bcdboot C:\windows /l en-us /s Z: /f UEFI

Booting as UEFI

Delete the new VM in Libvirt Manger

Do not delete the OS image

Create a new VM with UEFI boot using this image