I can't launch virtual box on my Dell vostro 14 with Ubuntu 22.04.
The error message says the problem maybe secure boot. I disabled it, and under it was an option to disable UEFI. I clicked it by accident, and got a warning that disabling UEFI could render the system unbootable.
Why? And isn't it always possible to boot from a OS USB like Ubuntu if the OS is totally corrupted?