Laptop secure boot issue

[Star_22]

Please help.

A recent windows update messed up something by updating the BIOS security i think and I need help to get this laptop back in working condition asap.

Laptop: ASUS Pro BU400A laptop
Issue: When I power it on sometimes it gets stuck on a black screen and sometimes it says "
Invalid Signature Detected. Check Secure Boot Policy in Setup
".

The problem is the laptops BIOS does not have an option to disable secure boot. None of the other similar things like selecting legacy/UEFI ROM, Other OS's, CSM etc can be found in the BIOS for me to change. What I am trying to do now is re install windows ( Win10 X64 V2004) but as I am using Rufus it needs me to disable secure boot. Is there another tool I can use that anyone knows of that creates a bootable USB device that does not require disabling secure boot or something?

 

[RandomSheepZA]

The Microsoft USB tool should help bud.

Sent from my CLT-L09 using Tapatalk

 

[Star_22]

Tried the MS usb tool but got the same issue so maybe its something else thats causing the issue. Anyway as an update I fixed it by installing an older version of windows 10 to the hdd on another computer and then put the hdd back into the laptop and after it booted up I used the USB with the updated windows version to "upgrade" and now it seems to be working fine but still if I want to install another OS or another windows I wont be able to do it with the USB method it seems.

 

[Bencrisp]

Sounds like you need to have a proper UEFI installer USB, i know with newer Dell laptops, they have disabled legacy boot all together