Can't Install in GPT with USB?

FunkMaster · 19 Jan 2018

I cannot get Windows 10 1709 USB3.0 Media created with Rufus (I think) to boot and install in GPT. I have to Enable Legacy just to get it to boot, and if I do it installs as MBR. If I Disable Legacy it won't find a Bootable USB Device in Boot Menu?
HP Pavilion HPE h8-1234 Desktop PC Product Specifications | HPÂ® Customer Support

HP Pavilion HPE h8-1234 Desktop PC Software and Drivers | HPÂ® Customer Support
Rufus is the only tool I've ever used to do this, so I assume that is what I used, but I forget now. I only say this because I don't see the little Rufus Icon in the files that I thought I saw before on another Rufus Created USB.

What do I do here? Do I need to Enable UEFI and change Boot Order in BIOS? I thought I tried that also, but so many things were tried at this point.

Do I need to Format as GPT First, or is there a way to get this thing to boot in UEFI Mode?

I just don't understand some of these UEFI Systems yet, but would like to install these in GPT.

Is the only way to do this with a DVD?

Thanks, FM

Kari · 19 Jan 2018

Tutorials:

This one is a one stop tool to create a USB install media for Windows 10 to be used on UEFI / GPT machines, Just run the script and follow instructions shown on screen:
PowerShell Scripting - Create USB Install Media for Windows 10 Installation Upgrade Tutorials

General instructions in this tutorial:
Create Bootable USB Flash Drive to Install Windows 10 Installation Upgrade Tutorials

Kari

Bat 1 · 19 Jan 2018

Can't just format the USB to FAT32, 7Zip the ISO open then copy and paste to to the USB ?

FunkMaster · 19 Jan 2018

I can create the bootable usb with Rufus, that is not the issue. The issue is, getting this pc to boot from it and install as GPT. Can someone explain, or link me to directions to do this?

EDIT: Maybe I just missed setting Rufus to GPT UEFI, I'll take a look at doing that again.

Thanks everyone, I will refer to this thread for the good Intel.

Bat 1 · 19 Jan 2018

You might need to take some pics of the BIOS settings to post. If you're working on the HP p6310p-d listed in your specs, I didn't even know Models from that date had UEFI

FunkMaster · 19 Jan 2018

Your right Bat1, and I completely messed up and forgot to leave the specs to the pc I'm working on. I just Posted them in the First Post of this Thread. This is a computer that I may adopt, but not sure yet as I love my Dell 660s.

EDIT: Just Updated my Specs also!

Bat 1 · 19 Jan 2018

OK that's much more better :) If You have Secure boot disabled, Legacy support enabled, and Fast boot disabled with the USB set as your First Boot option, You "Should" see the choice of either booting UEFI or MBR if the install media was created correctly.

Berton · 19 Jan 2018

Bat 1 said:

Can't just format the USB to FAT32, 7Zip the ISO open then copy and paste to to the USB ?

That doesn't make the USB drive bootable. The older OSes such as MS-DOS 6.22 and earlier had a command of format /s which did transfer the boot/system files to create the bootable floppy disk. The latest I've used was called DOS 7 from Windows ME, think that was the last that had the ability to boot to what could be called "pure DOS". I did find a way to use the WinME floppy to create a bootable CD but no need for it now.

Bat 1 · 19 Jan 2018

Berton said:

That doesn't make the USB drive bootable. The older OSes such as MS-DOS 6.22 and earlier had a command of format /s which did transfer the boot/system files to create the bootable floppy disk. The latest I've used was called DOS 7 from Windows ME, think that was the last that had the ability to boot to what could be called "pure DOS". I did find a way to use the WinME floppy to create a bootable CD but no need for it now.

Have You personally ever tried ? It works for Me and everyone else so......

Bree · 19 Jan 2018

Berton said:

Bat 1 said:

Can't just format the USB to FAT32, 7Zip the ISO open then copy and paste to to the USB ?

That doesn't make the USB drive bootable. The older OSes such as MS-DOS 6.22 and earlier had a command of format /s which did transfer the boot/system files to create the bootable floppy disk....

Bat 1 said:

Have You personally ever tried ? It works for Me and everyone else so......

The only extra bit MS-DOS did was to copy the system files after the format. The ISO contains the required system files for UEFI and Legacy boot, and copying them to a Fat32 formatted USB make it bootable (initially, just for UEFI). Marking the partition as Active is required to make it bootable for legacy bios systems too.

Works fine - done it many times...