Can install Windows 10 due to insuffient space on a 500GB partition

I guess you want to install Win 10 on drive 2 on the 466 GB unalloacated space.

Boot from the Win 10 USB installation drive as UEFI, and select the unallocated space to install on.

As you have a UEFI BIOS, you should install as UEFI-GPT
Detach any other drives (SATA or Power cable) from the MB.

During POST, press F12(?) to launch the boot menu. You will see two options for the USB drive. USB UEFI (Name) and USB (Name). Select USB UEFI (Name) to install as UEFI-GPT.
Go to install and and select the unallocated space and then proceed.
If you don't want to use MS account, don't enable updates or connect to the internet during installation.

Megahertz said:

I guess you want to install Win 10 on drive 2 on the 466 GB unalloacated space.

Boot from the Win 10 USB installation drive as UEFI, and select the unallocated space to install on.

As you have a UEFI BIOS, you should install as UEFI-GPT
Detach any other drives (SATA or Power cable) from the MB.

During POST, press F12(?) to launch the boot menu. You will see two options for the USB drive. USB UEFI (Name) and USB (Name). Select USB UEFI (Name) to install as UEFI-GPT.
Go to install and and select the unallocated space and then proceed.
If you don't want to use MS account, don't enable updates or connect to the internet during installation.

Hi Megahertz,

Yes, I want to install Win10 in the (466GB) unallocated space. I have tried your instructions, but I get a message stating something to the effect that I don't have enough space on that partition (unallocated space of 466GB).

All the rest I can handle as long as the installation goes as expected (with no problems).

Kind regards,

tecknot

- - - Updated - - -

Megahertz,

I just converted my USB flash drive to a GPT drive. However, I do not know how to check and change it to an UEFI. Can you help me out with that part?

Kind regards,

tecknot

- - - Updated - - -

This just in... It turns out that Windows Media Creation Tool converted my GPT USB flash drive back to an MBR drive (non-GPT). Diskpart will not let me convert it back to GPT.

Kind regards,

tecknot

@tecknot and @Pentagon
I don't understand the discussion here.
- The drive is UEFI-GPT and it boots Win 11 so nothing wrong with the boot manager in the EFI partition.
- Win 10 isn't installed. Once you install on same drive an option to boot Win 10 will be also installed.
@tecknot
You can initialize a drive as MBR or GPT.
Boot able drives can be UEFI - GPT or Legacy - MBR depending how did you initialize the drive.
If the drive is GPT, you have to boot it as UEFI as GPT has no MBR to boot as Legacy.
Your drive 2 is GPT and Win 11 is booting as UEFI so you MUST install Win 10 as UEFI. To do so, you must boot the Win 10 USB installation drive as UEFI. Use the one time boot menu (F12?) during POST to choose USB UEFI (Name).

If you're getting the message that you cant install on drive 2 on the unallocated partition is because you booted the Win 10 USB installation drive as Legacy and not UEFI.

If you're getting the message that you cant install because you don't have enough space is because you didn't select the unallocated space and it is probably referring to the EFI partition.

You don't need to enter a Win 10 key as you already has a Win 10 and Win 11 digital license.

Just skip on entering a license.