To switch back to UEFI, restart your computer and access the BIOS setup by pressing the appropriate key (often F2, F10, or Delete) during boot. Locate the Boot Mode setting and switch from Legacy ...

If the system has been imaged with the BIOS set in the Legacy Mode, this BIOS reset will place the system in a no-boot configuration as the default BIOS setting is UEFI. If you had been operating ...