Installation de Windows 10 avec GPT/UEFI

Hi,

Normally on Asus BIOS, it's F7 to go into the advanced options.
From there, you have the boot options.
If the CSM option is enabled, you won't have the UEFI choice.
You need to disable it.
You have screenshots here: https://www.malekal.com/activer-desactiver-csm-bios/

It would indeed be good to provide photos.

By setting it to default, it should also revert to UEFI.

~~

You might have a BIOS update available here: https://www.asus.com/Laptops/For-Home/ASUS-Laptop/ASUS-X570/
However, it's strange because with the model you mentioned, we can't find anything.

Hello,

Your PC seems to be running without an OS, but probably has a Free OS
(an OS other than Windows and free, so you need to clear the hard drive before and during the installation)
Here we can see that you are trying to install Windows 10 on one of the three partitions.
That’s not right; a hard drive without an OS is empty, but these would be partitions of another operating system.

Your error message casts doubt on whether your USB drive is good.
Normally, Windows 10 should say it needs GPT if done correctly.

Yes, you need to be in UEFI mode and disable CSM (or legacy mode).
Note: UEFI is not always indicated; it just means you shouldn't activate a degraded mode.

We will restart from scratch from A to Z to avoid troubleshooting different possible errors one by one.
Below is what you need to do, and it has already been provided; it’s just point by point for your case.
---------------------------------------

1 > Download the ISO /

(it doesn't matter which PC you use for this)
An ISO is a disk image, but in its current state, don't click on it.
It's a resource that will help us create a USB installation drive. We need to mount this image.

Windows 10 x 64 Home and Pro ISO (link valid for 24 hours)
https://software-download.microsoft.com/sg/Win10_1909_French_x64.iso?t=d0bd33fd-601d-4297-808d-439caf36313b&e=1582553860&h=1c1e646c54f94acc92e5f5652328ca5b


2 > Create the installation USB /

Download the Rufus software:
https://www.commentcamarche.net/telecharger/utilitaires/19615-rufus/


> Basically, point to the USB stick you will use (8 GB or more)
Be careful, clear your USB stick beforehand because everything will be erased from it.
> point to the ISO file you just downloaded
> set the partition type. (GPT as shown in the image)
> Start the creation and wait for the completion message.

3 > Boot your PC to repair using your installation USB /

Bios set to UEFI (and nothing other than UEFI, no CSM or legacy mode activated)
and disable secure boot
(by default, UEFI mode should be sufficient, so only deactivate secure boot if the PC does not boot from the USB stick)
Confirm when exiting

Turn off the PC
Plug in the USB stick
Restart
The PC should boot directly from the USB stick, so the installation process begins.
If there are issues
Set your USB as the first boot device
or
Go through the boot choice page and boot from your USB
or
We can review this together.

4 > Installing Windows /

Here’s a preview for Windows 10 (not really up-to-date but just an overview)
http://www.windows8facile.fr/installer-windows-10/

License key to enter if already purchased.
(or skip the step without entering anything and buy one later)

Choose Pro or Home based on what you want and related to your license key, whether Home or Pro.

You will start a "custom" installation
You will follow the procedure and arrive at a table that will list the locations and ask you "where to install Windows".

At this point:

> We will clear the whole disk before installing (in case you have a Free OS on it)

Press Shift and F10
(the command prompt opens)

Enter the following commands one by one, confirming each with enter:

diskpart
list disk
sel disk X (replace X with the number corresponding to your hard drive you want to erase)
clean
convert gpt
exit
exit

Result -
Basically, we clear the disk and you will return to the installation screen.
You will only have one volume to choose for installation.

The installation will take place.

Remove the USB stick during this restart
(at worst, if it doesn’t face that moment and the PC has booted back to the USB, you can remove it roughly, and the rest of the installation will continue)

5 > Once installed, there are a few points to check /

If activation is okay (or go buy a valid key, as mentioned 10 to 20 Euros online)
And
If drivers are okay and if not, use this
https://www.commentcamarche.net/faq/48455-mettre-a-jour-ses-pilotes-gratuitement-avec-driverscloud
We’ll see together when you get there.

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Hello.

In the BIOS, set UEFI instead of LEGACY (then press F10 to validate)

Or convert the disk to MBR:
Instead of starting the installation, click on Repair your computer -> Troubleshoot -> Advanced options -> Command prompt, then type

diskpart
list disk
(it should normally be disk 0)
select disk 0
convert mbr

Convert the disk to MBR.