How to install/boot Windows in UEFI mode

[estriden]

I just got an Acer Aspire A515-51G which came with a Linux distribution preinstalled. The first thing I did was install Windows 10 instead.
I used the Media Creation Tool to create an .iso file and then burned this file onto a DVD. When I tried booting the laptop from the DVD in UEFI mode by changing the boot order and disabling Secure Boot, the laptop would just boot the Linux OS anyways. Only after switching to legacy mode did the laptop boot from the Windows DVD.
Now that Windows 10 is installed, I wanted to switch the boot mode back to UEFI but when I did that, I got a "no bootable device" error on start-up.
My understanding is that UEFI is better/safer than legacy mode, so ideally I would like my Windows 10 OS to boot in UEFI as well. How can I accomplish that? If the only way to do this is to install Windows 10 again in UEFI mode, how do I ensure that the laptop does indeed boot from the DVD and does not ignore my boot order settings?
Thanks for your help!

(I have a 256 GB SSD and no HDD in my laptop, if that is relevant.)

 

[karenjoly]

What is the partition scheme? Systems that support UEFI require that boot partition must reside on a GPT disk.

 

[estriden]

Hi Karen, I checked in diskpart and my only partition does not have an asterisk in the GPT column, so I assume it is formatted in MBR. Is this a problem?

 

[Calvin7]

Win10 creates 4 partitions: recovery, EFI, Microsoft Reserved (MSR) and Windows partitions. No user activity is needed when starting with an empty hard drive.

I would delete all partitions including the Linux distribution preinstallation along with any recovery or hidden partitions Acer may have preinstalled. That way you start with an empty drive.

How to create a bootable UEFI USB drive with Windows 10 Setup
https://winaero.com/blog/how-to-create-a-bootable-uefi-usb-drive-with-windows-10-setup/

 

[estriden]

Win10 creates 4 partitions: recovery, EFI, Microsoft Reserved (MSR) and Windows partitions. No user activity is needed when starting with an empty hard drive.

I would delete all partitions including the Linux distribution preinstallation along with any recovery or hidden partitions Acer may have preinstalled. That way you start with an empty drive.

How to create a bootable UEFI USB drive with Windows 10 Setup
https://winaero.com/blog/how-to-create-a-bootable-uefi-usb-drive-with-windows-10-setup/

Thanks for the link! Does this mean installing Windows in UEFI mode will only work with a USB stick and not with a DVD?
And with regards to the partitions, I had to delete all of them anyways as otherwise there would be an error message regarding partition schemes (something with Windows only being able to install on GPT partitions).