Windows 10: Windows won't boot in UEFI mode, deleted EFI partition.

Actually you are way better off, just unplugging the OLD HDD and doing a clean Installaion of windows 10 on the New SDD

then plugin the Old HDD for use as a second DATA drive

 

That's probably the best option, because i'm really fed up with this problem now. *Sad It's just a bit difficult to remove the hard drive on this laptop, and very time consuming as well.

 

Haven't done this in a while, but can't you just disable the second HDD through the BIOS? Normally, it is set to auto detect, I think. Switching this to Disabled should do the trick. But as I said, haven't done this in a long time.

 

Haha, i changed the wording of my message since you quoted me. That's a good point, i did think about doing this earlier but almost forgot. I will have a look and see whether there's an option, but unfortunately this is a laptop BIOS and usually they can be quite limited with the functionality. *Sad

 

Exactly you are right. I also did the same and installed windows 10 as a clean install and now i am enjoying with uefi native mode. Yes when you create bootable setup in flash drive you use gpt partition scheme for uefi. But before doing to install for the first time either delete the whole hardisk partition from the same wizard where you partitions while installing and create new ones according to ur needs. But what i did when i first saw the screen install now for windows 10. I chose repair this pc and somehow i managed to get into command prompt and used the diskpart program. I am sure you aware of this. In which you just use these 3 commans . List disk . Select disk # . Clean . Convert gpt . These 4 commands convert your partition table from mbr into gpt and that then you exit and install it from the start again as normal. Its that simple

 

Does your laptop came with windows 10 oem preinstalled??

 

Here lies another issue > stop using RUFUS
MS does not use RUFUS..

MS setup media will boot Legacy and UEFI depending on the PC's Firmware settings
Most Newer PC's boot UEFI by default

The issue comes from having legacy support enabled in the Firmware and you selecting the WRONG USB boot Mode from the Boot menu

 

Hmm, unfortunately it seems like that could be the case. I had a look in the BIOS for the ability to disable a hard drive or SATA port, but unfortunately nothing was listed. However, i did come across one interesting option and i think it could be of use in this situation:

"Launch EFI shell from filesystem device. Attempts to launch EFI shell application (Shellx64.efi) from one of the available filesystem devices."

I'm curious as to whether this means anything and has potential to help with my issue. What do you think?

 

I use RUFUS, because the system I use for creating my bootable media doesn't have UEFI support. So, MS setup media can't detect UEFI when creating the media. That's why I couldn't boot it with my HP ProBook which was set to boot with UEFI.

RUFUS was the only option for me, and I advice to use this to others, because it gives them more control over how to create their media.


Sometimes, you don't have access to a crashed system, and you have to prepare the bootable media on an other system.

BTW, tried all the options I had access to on my first bootable media, but none of them worked. When I created my media with RUFUS, an extra option popped up in the boot menu, which made it possible to boot with my USB stick. *Smile

 

This could work. I don't have that option in my UEFI, so I can't be sure. I know I tried to boot with an EFI file, through the Boot menu, but that didn't work on my system.

 

that shell is BOOTMGR.efi

 

I am also using uefi native mode in my hp probook 450 g2 notebook pc

 

Excellent news, it worked fine once i did this! There was quite a delay because i had to wait for the Windows image to download, but once i attempted booting the USB with the drive set up in Rufus strictly for UEFI systems only, it worked fine.

Thanks for suggesting the fix and i must apologise for not believing this would work at first, haha. Cheers to everyone else who had responded in an effort to help out, it is much appreciated. *Smile

 

No problem. As you have guessed, I'm a very patient person.

And I'm glad it worked for you. Now have fun with Windows 10. I know I'm having a lot of fun with it! *Smile

 

Credit goes to me too . I always emphasize the use of rufus.. actually you also have the option of "customized boot" in the bios too in case hp brand who hard core define the unique path of boot manager but you can define by yourself in case you wanna use linux and set the path and adjust the boot device order...so all is good for now