The effort to address these concerns began in 1998 and was initially called Intel Boot Initiative. BIOS limitations (such as 16-bit real mode, 1MB addressable memory space, assembly language programming, and PC AT hardware) had become too restrictive for the larger server platforms Itanium was targeting. The original motivation for EFI came during early development of the first Intel–HP Itanium systems in the mid-1990s.

UEFI is independent of platform and programming language, but C is used for the reference implementation TianoCore EDKII. In 2005, UEFI deprecated EFI 1.10 (the final release of EFI). Some of the EFI's practices and data formats mirror those of Microsoft Windows. Intel developed the original Extensible Firmware Interface ( EFI) specifications. UEFI replaces the BIOS which was present in the boot ROM of all personal computers that are IBM PC-compatible, although it can provide backwards compatibility with the BIOS using CSM booting. Examples of firmware that implement these specifications are AMI Aptio, Phoenix SecureCore, TianoCore EDK II and InsydeH2O. They define the architecture of the platform firmware used for booting and its interface for interaction with the operating system.

UEFI ( Unified Extensible Firmware Interface) is a set of specifications written by the UEFI Forum. They can use different I/O protocols, but SPI is the most common. You should notice all of the Keys below will now say ‘Installed’.The UEFI implementation is usually stored on a NOR-based EEPROM that is located on the mainboard. Select ‘Install All Factory Default Keys’.Set ‘Factory Default Key Provisioning’ to ‘Enabled’.(This may be set to standard mode, if so set to custom). Please make sure ‘Secure Boot Control’ is set to ‘Enabled’.Ğnter into the ‘Secure Boot’ menu option.ěoot the computer and press F2 key to enter BIOS.To get rid of the watermark you must first enable secure boot. Thank you for your email, we apologise for the inconvenience this may have caused you. If you want to remove the watermark by activating your secure boot do the following.

Pc must support secure boot