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How to solve boot failed problem

Hello everyone,
I had a dual boot Ubuntu and Windows 10 and they were working normally...I formatted the hard drive outside the laptop by deleting all partitions and when I returned the hard drive back into the laptop when I open the laptop it shows "Ubuntu boot failed" message and after continuing it shows "Windows boot manager boot failed" I tried to burn a linux or windows on a usb or cd when I enter the boot menu and choose to boot from usb it gives me boot failed error the only working choice is the hard disk and it is in legacy mode I entered the bios menu and changed it to UEFI but after saving and restarting I entered again to find all settings are unsaved....any suggestions for how to stop seeing those boot failed errors and boot normally in UEFI mode ?

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All Answers

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Answer
Re: boot failed

In reply to: How to solve boot failed problem

if you disconnect the hard drive and boot, you'll get another message. That proves that it still boots from that drive, not from the Linux of Windows install cd or stick you tried to burn.
However, you don't "burn" to a USB-stick , and Windows and common Linuxes don't fit on a cd, but need a DVD, so that might explain it doesn't work, unless you did something else than you told.

Are you sure that disc or stick is bootable? How exactly did you make them? Can you boot from them on another PC? Does your PC boot from an old original holographed Microsoft Windows disc you used for Windows XP, Vista, 7 or 8?

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Re: boot failed

In reply to: Re: boot failed

sorry I meant DVD and yes the disk and the stick are bootable I tried them on another computer and they boot normally in UEFI mode
and if I disconnect the hard drive nothing changes
when I insert a bootable device and choose to boot from it from the boot menu I get boot failed error and when I continue the laptop continue to the same message in the black screen but this time enter to the bootable device and boot normally but in legacy mode

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Answer
As the bootable items work on another PC

In reply to: How to solve boot failed problem

I worry this PC has flaws in BIOS or a failing DVDRW drive.

I know I run into this from time to time and find this is when I get to look for the maker to have issued a new BIOS.

As you know, a PC BIOS is all over the map as to settings but it appears you either didn't set your USB/DVD to boot first or the BIOS is flawed.

So look again in the BIOS for boot order as well as any fast boot options. Some fast boot systems skip checking other drives for booting to speed up boot time so you have to turn that off.

In the future, if you can or elect to, share the exact make and model machine.

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