Kubuntu installation failed (dual boot) and I can't access any operating system

tl flag

I tried a dual boot with Windows 10 and Kubuntu. My BIOS mode was "Legacy". I prepared the free space to install Kubuntu. I made sure to use that space to create the /, /boot, /home partitions etc. I had a message asking to create an EFI partition, so I did it and assigned it 1GB. The installation process failed: it had a "fatal error" that said "unable to install GRUB in dev/sda". It restarted and opened what I think was Kubuntu Live or Kubuntu test, with a shortcut on the desktop that said "Install Kubuntu". I repeated the steps again and same error. The problem is that now I can't access any operating system. The PC boots, appears logo of my ASUS BIOS, black screen with the _ line and then enters the BIOS automatically. Setting boot priority for my hard drive does not change this loop. I am afraid I have corrupted the boot of my Windows. I can only access the Kubuntu installation media via my USB.

Excuse my English, I'm using a translator.

Will avatar
id flag
It would be very unusual for Windows 10 to use legacy - so you may have a situation where Kubuntu is trying to install in legacy and Windows is in uefi. Try charging back to uefi and see if Windows will boot?
oldfred avatar
cn flag
Please copy & paste the pastebin link to the BootInfo summary report ( do not post report), do not run the auto fix till reviewed. Use often updated ppa version over somewhat older ISO with your USB installer or any working install. &
Marcos 1520 avatar
tl flag
I sit in a Tesla and translated this thread with Ai:


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