Windows 10 Pro 64 bit Upgrade to Version 2004

Hi Greg

The Windows 10 ISO size currently does not fit on a standard DVD, it would need to be burned to a Dual-Layer DVD and a USB drive is more reliable and faster to use . . .

Should I also burn the .iso file to a CD/DVFD?

Maybe a few things to check but I would not disable Secure Boot on a UEFI system, but make sure your Bios is up to date..  You do have to make sure and boot the Install Media in the UEFI configuration.

If this is a Business Desktop, might it have an special protection utilities to keep Windows from being removed?

Could you go back to Diskpart and type the command below and get a screen shot.

list disk or for short, lis dis

If you find a Disk 4 or the one being referenced, you might then run the command below in Diskpart, which uses only the first 3 letters of the command..

sel dis X    where X is the disk number of the OS drive..

det dis

Do you run an xBox?

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt

  --------  -------------  -------  -------  ---  ---

  Disk 0    Online          931 GB  1024 KB        *

  Disk 1    Online         1863 GB  1024 KB        *

DISKPART> sel dis 1

Disk 1 is now the selected disk.

DISKPART> det dis

Samsung SSD 970 EVO Plus 2TB

Disk ID: {D6563CED-295E-4D56-9665-488962FBB4C8}

Type   : NVMe

Status : Online

Path   : 0

Target : 0

LUN ID : 0

Location Path : PCIROOT(0)#PCI(1B04)#PCI(0000)#NVME(P00T00L00)

Current Read-only State : No

Read-only  : No

Boot Disk  : Yes

Pagefile Disk  : Yes

Hibernation File Disk  : No

Crashdump Disk  : Yes

Clustered Disk  : No

  Volume ###  Ltr  Label        Fs     Type        Size     Status     Info

  ----------  ---  -----------  -----  ----------  -------  ---------  --------

  Volume 1     C   Win 10       NTFS   Partition    899 GB  Healthy    Boot

  Volume 2                      NTFS   Partition    498 MB  Healthy

  Volume 3     E   PriBackup    NTFS   Partition    963 GB  Healthy

  Volume 4                      FAT32  Partition    100 MB  Healthy    System

Okay Greg, then there may be a problem with the installation media you are using, the best option would be to re-create that USB drive and hopefully you won't get that error . . .

Disabled Secure/Safe Boot. Deleted Drive 4 partitions to get to unallocated space. Started install and got the same message: "Windows could not prepare the computer to boot into the next phase of installation. To install Windows, restart the installation."