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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.
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.
GNU GRUB, a popular open source bootloader Windows Boot Manager. 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]
When a user is logging on to Windows, the startup sound is played, the shell (usually EXPLORER.EXE) is loaded from the [boot] section of the SYSTEM.INI file, and startup items are loaded. In all versions of Windows 9x except ME, it is also possible to load Windows by booting to a DOS prompt and typing "win".
When booting, the loader portion of NTLDR does the following in order: Accesses the file system on the boot drive (either FAT or New Technology File System, NTFS). If Windows was put in the hibernation state, the contents of hiberfil.sys are loaded into memory and the system resumes where it left off.
In Windows 7 and later, significant hardware changes (e.g. motherboard) may require a re-activation. In Windows 10 and 11, a user can run the Activation Troubleshooter if the user has changed hardware on their device recently. If the hardware has changed again after activation, they must wait 30 days before running the troubleshooter again.
In Microsoft Windows 7 and above, the loader is the LdrInitializeThunk function contained in ntdll.dll, which does the following: initialisation of structures in the DLL itself (i.e. critical sections, module lists); validation of executable to load; creation of a heap (via the function RtlCreateHeap);
Loader (computing) LOADER.EXE, an auto-start program loader optionally used in the startup process of Microsoft Windows ME; Loader (surname) Fast loader; Speedloader; Boot loader. LOADER.COM (aka "NEWLDR"), a multi-boot loader shipping with various Digital Research, Novell, IMS, Caldera, etc. DOS-based operating systems like Multiuser DOS and ...