Windows 10: Secure boot issues

Hi, I am using an acer travelmate laptop and I'm attempting to boot from an official (I think) windows 10 DVD, I downloaded it using the media creation tool (as a dual x64-x86 iso) and created a bootable iso from the x64 portion (with imgburn) the disk definitely works as I tested it in a VM.
However, when I attempt to get it to boot from this disk to reimage my laptop (system image was 'taken on a EFI' based firmware, even though I switched it to BIOS long before reimaging), no matter what I do it doesn't detect the dvd in the boot menu or show the 'hit any key to boot from a CD/DVD' screen, I have so far:
Disabled UEFI all together; this resulted in the 'imaged on EFI, this computer is using BIOS' error
Attempted to change the boot order; this couldn't be done, besides the (BIOS?) boot order was correct with CD/DVD at the top
Gone through all the steps to disable secure boot (set firmware passwords and then disable secure boot); the DVD STILL doesn't show up.
I still cannot change 'secure boot mode' as it's still grayed out on this annoying firmware

Any suggestions as to how to get this ridiculous EFI firmware to recognise my bootable DVD?

:)

 

windows 10 secure boot issues

Hi,

Have you tried using the System Restore and go back to the previous build version of Windows 10? Sometimes, updates have an incomplete installation or being corrupted, because updates are not downloaded or installed correctly even it shows a 100% competency.

Please refer to the links below:

•System Restore

•Troubleshoot black screen

Regards.

 

windows 10 secure boot issues

been getting a black screen error message on start up for a while now, here's the message:

"Your system found unauthorized changes to the firmware, operating system, or UEFI. Press [N] to run the next boot
device, or enter directly to the bios setup if there are no other boot devices installed. Go to bios setup>Advanced>Boot and change the current boot device into other secured boot devices."

hitting enter or n will let the boot process continue successfully, no other issues. didn't start after any changes i made, just popped up one day so i think its related to an automatic update. but since i was able to get the computer to boot anyway, never
looked into it until now.

did a little searching and found that windows 7 users with asus motherboards had the same message but were unable to proceed past that point. i have an asus motherboard, but windows 10, so i figured i'd give the fix a try. it involves changing bios settings
to disable Secure Boot.

after changing the settings, computer boots to Windows Memory Diagnostic Tool which ran and passed. then it rebooted and came up with another black error screen saying something to the effect of windows cant boot. i immediately rebooted to bios and changed
the settings back. rebooted to the same original error message, so back to square 1.

anyone have any clue what the cause/fix could be?

 

I had a similar problem with a different DVD that was made on a different computer on my Dell 8700 with a UEFI BIOS and Secure boot. BIOS did allow a CD/DVD boot as I was able to boot the Win8.1 recovery disk Dell provided.

What I discovered is that the DVD had to be a UEFI DVD. So I copied the DVD contents over to a folder on the hard drive (can read the DVD just not boot it). I then burned those files to a NEW DVD. Then I could boot that DVD.

If you made that DVD on the same one you are having a problem booting with I don't know what to tell you, it should be a UEFI DVD? Can try what I did if you want?

 

The dvd wouldn't work, however a recovery disk I created previously, that I didn't think would work due to it failing to work in a virtual machine, worked fine at booting the laptop, it showed up fine in the boot list
What I don't understand is why the recovery one worked (which I created through the windows 10 recovery disk wizard) when the installation disk didn't (when it worked on a virtual machine with EFI)? Missing files maybe..
?
Thanks for your help

 

I don't think missing files is the reason. VM's virtalize the h/w so it doesn't look the same.

Any DVD created under UEFI BIOS should work. Have you tried just copying the non-bootable DVD to another on that computer and see if it works? That is all it took to make mine work.