"Windows cannot be installed on this disk. The selected disk is of the GPT style."

Hi,

I am trying to dual-boot Windows 10 TP with Windows 8.1 on my laptop. After booting from a bootable USB and starting setup, I get the following error when selecting the desired partition:

"Windows cannot be installed on this disk. The selected disk is of the GPT style."

After looking for help on the internet, I found that 32-bit Windows cannot be installed on a GPT partition. I then reformatted the drive with 64-bit Windows software, and got the same error.

Are there any other steps I can take to convert the partition style into the appropriate format?

If so, please help!

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ID

You cannot convert a single partition but if you dont mind wiping you can convert the HD

http://en.wikipedia.org/wiki/GUID_Partition_Table

Cat herder
Windows Insider MVP
MVP-Windows and Devices for IT
http://www.zigzag3143.com/

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Thanks for replying..

The only problem is that my computer supports UEFI and Windows is 64-bit as well, so I don't understand why it's not installing.

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I had the same problem. What I ended up doing, when it came to the screen where you select the disk to install on, and where you can reformat the drive. Instead of just formatting, delete the partition and create a new one, it will create the correct type of partition and should start the installation. (Please note that this will DELETE everything on your drive that you select).

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Thanks Thomas,

I will try this tomorrow and give you some kudos if it works.

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yo could install the 64 bit version of the technical preview or format the drive as ntfs

to do so you must be sure that you partition the drive into sizes that arent too big to be formatted as ntfs

also you need to disable eufi mode to install 32bit version (or install it in VMWare player or something)

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ID

You cannot convert a single partition but if you dont mind wiping you can convert the HD

http://en.wikipedia.org/wiki/GUID_Partition_Table

Since he has a laptop as do I, our problem is WPT doesn't recognize USB drives and there is only one drive in the laptop!!

I don't understand how your suggestion has any use!

Still WAITING for a perfect Windows!
                 during upgrades
       CREATE RESTORE POINTS!

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You get the GPT message when you boot into the Legacy version of the install media and try to install on a GPT (UEFI) configured drive.   The install media has the ability to boot as UEFI or Legacy and depending on your system, needs to be chosen at boot using a boot device menu.  USB drives formatted as NTFS will not boot as UEFI.

Yes, you need an x64 version to be able to use UEFI of Windows 7, 8.1 or 10.

And as has been mentioned, GPT is the configuration for the Entire Drive, not just one partition.

_____________________________________
ASUS Z490 Intel i9 10900K
Fully Win 11 Qualified

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Thanks Saltgrass,

You get the GPT message when you boot into the Legacy version of the install media and try to install on a GPT (UEFI) configured drive.   The install media has the ability to boot as UEFI or Legacy and depending on your system, needs to be chosen at boot using a boot device menu.  USB drives formatted as NTFS will not boot as UEFI.

Yes, you need an x64 version to be able to use UEFI of Windows 7, 8.1 or 10.

And as has been mentioned, GPT is the configuration for the Entire Drive, not just one partition.

I have an 8.1 x64 notebook.  One built-in HDD.  When I burned the WTP x64 ISO onto a USB thumbdrive I saw no option to format the thumbdrive as UEFI.  I just presumed UEFI would be the default.  It was not recognized as such so when I got the WTP setup to run it produced the error message.  It would not "see" any USB drives either.

My "BIOS" would only boot from the USB as legacy (CSM boot(?), Ill have to go back into BIOS to see what it's called.)

I tried both the MS ISO utility (Windows7-USB-DVD-Download-Tool-Installer-en-US) and Universal-USB-Installer-1.9.5.6.

If either offered a UEFI format option I missed it.

TIA

Still WAITING for a perfect Windows!
                 during upgrades
       CREATE RESTORE POINTS!

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I said if the flash drive was formatted as NTFS it would not boot as UEFI.  You can check the formatting on the drive and if it is Fat32 it is OK, but if it is NTFS you need to redo the drive and use RUFUS or some Diskpart commands to set it up then copy over the contents of the mounted .iso file.
_____________________________________
ASUS Z490 Intel i9 10900K
Fully Win 11 Qualified

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I said if the flash drive was formatted as NTFS it would not boot as UEFI.  You can check the formatting on the drive and if it is Fat32 it is OK, but if it is NTFS you need to redo the drive and use RUFUS or some Diskpart commands to set it up then copy over the contents of the mounted .iso file.

Thanks for the clarification.  I had thought the formatting was included on the ISO.

Still WAITING for a perfect Windows!
                 during upgrades
       CREATE RESTORE POINTS!

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Last updated February 2, 2021 Views 33,634 Applies to: