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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.
In Windows NT, the booting process is initiated by NTLDR in versions before Vista and the Windows Boot Manager in Vista and later. [4] The boot loader is responsible for accessing the file system on the boot drive, starting ntoskrnl.exe, and loading boot-time device drivers into memory. Once all the boot and system drivers have been loaded, the ...
Note: The column MBR (Master Boot Record) refers to whether or not the boot loader can be stored in the first sector of a mass storage device. The column VBR (Volume Boot Record) refers to the ability of the boot loader to be stored in the first sector of any partition on a mass storage device.
GNU GRUB, a popular open source bootloader. Windows bootloader. A bootloader, also spelled as boot loader[ 1][ 2] or called bootstrap loader, is a computer program that is responsible for booting a computer. If it also provides an interactive menu with multiple boot choices then it's often called a boot manager. [ 2]
Unlike the legacy PC BIOS, UEFI does not rely on boot sectors, defining instead a boot manager as part of the UEFI specification. When a computer is powered on, the boot manager checks the boot configuration and, based on its settings, then executes the specified OS boot loader or operating system kernel (usually boot loader [52]).
UEFI support in Windows began in 2008 with Windows Vista® SP1. [21] The Windows boot manager is located at the \EFI\Microsoft\Boot\ subfolder of the EFI system partition. [22] 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 ...
The system partition and the boot partition (also known as the system volume and the boot volume) are computing terms for disk partitions of a hard disk drive or solid-state drive that must exist and be properly configured for a computer to operate. There are two different definitions for these terms: the common definition and the Microsoft ...
The VBR boot code tries to find and execute NTLDR for Windows XP, Windows Server 2003 and earlier, or the Windows Boot Manager for Windows Vista and later, from an active partition. On systems with a UEFI, the UEFI invokes bootmgfw.efi from an EFI system partition at startup, starting the Windows Boot Manager. Boot loader phase