We also mentioned “UEFI”…which is the “Unified Extensible Firmware Interface”. Some information from UEFI.org might help to understand its function…

“…the BIOS refers to a specific implementation of the firmware that initializes the platform and loads an OS setup.”

“BIOS is typically used to refer to an Intel Architecture firmware implementation rooted in the IBM PC design. Based on older standards and methods, BIOS was originally coded in 16-bit real mode x86 assembly code…”

“…UEFI specifications define an interface in which the implementation of UEFI performs the equivalent of the BIOS, by initiating the platform and loading the operating system.”

“…UEFI is ‘processor architecture-agnostic,’ supporting x86, x64, ARM and Itanium.”

“…the Specification supports a more secure system, a faster boot time, improved performance…With regard to security, UEFI Secure Boot helps defend against malware attacks before the operating system loads.”

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And if you ever need to install Windows 10, the information on how to download and install it can be found at https://www.microsoft.com/en-us/software-download/windows10