Convert Windows 10 from Legacy BIOS to UEFI without Data Loss

Brink · 01 Dec 2017

I'm glad it could help Burgurne. :)

dowon · 03 Jan 2018

Brink said:

I'm glad it could help Burgurne. :)

Hello, I was successfully able to convert to UEFI using this tutorial. I checked my partitions and noticed that a new partition (EFI System Partition) was added. Is it safe to delete this to get more memory or should I leave it as is?

Convert Windows 10 from Legacy BIOS to UEFI without Data Loss-part.png

Brink · 03 Jan 2018

Hello dowon, :)

The EFI partition is normal. You do not want to delete it since it is required to boot a UEFI Windows installation.

I'm glad it went smoothly for you.

NavyLCDR · 03 Jan 2018

dowon said:

Hello, I was successfully able to convert to UEFI using this tutorial. I checked my partitions and noticed that a new partition (EFI System Partition) was added. Is it safe to delete this to get more memory or should I leave it as is?

The EFI System Partition is now what the computer is booting from. Delete it and the computer will not boot.

Kpat62 · 01 Feb 2018

Ok the conversion went well. Although it messed up System restore, there was a C drive (missing) in the available drives which had to be deleted.
Also it has assigned a drive letter E to the System reserved partition when it did not have one before.

Convert Windows 10 from Legacy BIOS to UEFI without Data Loss-capture.png

Should the drive letter be removed?

Brink · 01 Feb 2018

Hello Kpat62, :)

Yes, you can remove the drive letter for "E". It normally wouldn't have one.

Kpat62 · 01 Feb 2018

Thank you Brink
I set the label to none. All is well.

Brink · 01 Feb 2018

ntd252 · 19 Apr 2018

I have a triple-boot system: Windows 7 + Windows 10 + Linux Mint.
I have backed up everything, so can I use that method with accepting that things can go wrong?

Brink · 19 Apr 2018

Hello ntd252,

I wouldn't recommend doing this when you have a multiboot system like that. It will most likely break it.