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UEFI machines can have one of the following classes, which were used to help ease the transition to UEFI: [96] Class 0: Legacy BIOS; Class 1: UEFI with a CSM interface and no external UEFI interface. The only UEFI interfaces are internal to the firmware. Class 2: UEFI with CSM and external UEFI interfaces, eg. UEFI Boot.
In the UEFI Shell, the SmbiosView command can retrieve and display the SMBIOS data. [15] [16] One can often enter the UEFI shell by entering the system firmware settings, and then selecting the shell as a boot option (as opposed to a DVD drive or hard drive).
The Windows Boot Manager (BOOTMGR) is the bootloader provided by Microsoft for Windows NT versions starting with Windows Vista and Windows Server 2008. It is the first program launched by the BIOS or UEFI of the computer and is responsible for loading the rest of Windows. [1] It replaced the NTLDR present in older versions of Windows.
UEFI support in Windows began in 2008 with Windows Vista SP1. [22] The Windows boot manager is located at the \EFI\Microsoft\Boot\ subfolder of the EFI system partition. [23] On Windows XP 64-Bit Edition and later, access to the EFI system partition is obtained by running the mountvol command. Mounts the EFI system partition on the specified drive.
Also, Windows 11 requires UEFI to boot, [87] with the exception of IoT Enterprise editions of Windows 11. [10] UEFI is required for devices shipping with Windows 8 [ 88 ] [ 89 ] and above. Other alternatives to the functionality of the "Legacy BIOS" in the x86 world include coreboot and libreboot .
The "It's now safe to power off the system" screen in Windows 10 and 11. Microsoft's Windows 98 was the first operating system to implement ACPI, [ 17 ] [ 18 ] but its implementation was somewhat buggy or incomplete, [ 19 ] [ 20 ] although some of the problems associated with it were caused by the first-generation ACPI hardware. [ 21 ]
Press the Windows key + R on your keyboard. Type sysdm.cpl and click OK. Select the Advanced tab. Under Startup and Recovery, click Settings. Under System Failure, uncheck the box Automatically ...
The Video BIOS provides some basic display services for BIOS and operating systems, for example INT 10H (Legacy BIOS), VBE (Legacy BIOS) and UEFI GOP. The original IBM PC BIOS included integrated support for the IBM CGA and MDA video adapters (and did not support option ROMs at all), so those video cards had no option ROMs.