XPS 9550 Clean Install: Can't Boot in UEFI!

Hi everyone,

I'm looking for some help in re-enabling the ability to boot with UEFI Secure Boot again after I performed a clean install using Microsoft's Media Creation tool.

I did the following:

1. Formatted a USB drive into FAT32;
2. Downloaded Windows 10 onto the USB drive via the Media Creation tool;
3. From the BIOS, turned off "Secure Boot" and enabled "Legacy Boot" to boot from the USB;
4. When prompted during install initialization, deleted all existing partitions and selected a new partition to install Windows on;
5. Rebooted the laptop and everything works just fine.

I then attempted to disable "Legacy Boot" and re-enable UEFI / Secure Boot, but when I try to do so, it says that there are no bootable devices found. I'm stuck in Legacy mode! How do I go about booting from UEFI again?

 

This has been posted a number of times already, but in brief: first you need to create a USB that is UEFI bootable, otherwise WIndows will install itself in Legacy mode. Use the Rufus tool to add your ISO to the USB (i.e. UEFI/GPT/FAT32 option). Disable the Legacy options in BIOS before booting the USB. If the F12 menu has trouble finding the USB, in F2 add a manual UEFI entry to the correct file on the USB. Remember to add Intel RST drivers to the USB and load them if you're sticking with default RAID mode, delete all partitions again and select unallocated space.

https://rufus.akeo.ie/

 

Oh okay - thought that was only for people upgrading to new harddrives. Thanks!

 

you can convert from legacy to uefi using easeus partition manager