The XPS™ 8700 is offered with UEFI (Unified Extensible Firmware Interface). It is a specification detailing an interface that helps hand off control of the system for the pre-boot environment (i.e.: after the system is powered on, but before the operating system starts) to an operating system, such as Windows or Linux.
UEFI provides a clean interface between operating systems and platform firmware at boot time, and supports an architecture-independent mechanism for initializing add-in cards.
The default Boot Mode is set to UEFI and the operating system is installed in the UEFI Mode from the factory. The System will display the following error if the Operating System was installed in UEFI Mode and the Boot Mode has been changed to Legacy or Vice Versa.
To correct this error, The user needs to change the Boot Mode in the System Setup from Legacy to UEFI Mode.
|Changing the Boot Mode in System Setup to UEFI|
Restart / Power on your computer.
At the first text on the screen or when the Dell™ logo appears, tap <F2> until the message Entering Setup appears.
Boot Mode will be listed under Boot.
How to install windows in UEFI Mode?
Does UEFI completely replace a PC BIOS?
No. While UEFI uses a different interface for "boot services" and "runtime services", some platform firmware must perform the functions BIOS uses for system configuration (a.k.a. "Power On Self Test" or "POST") and Setup. UEFI does not specify how POST & Setup are implemented.
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