Note: First of all, before resorting to cardinal actions, check whether the loading sequence is probably just incorrectly set. In this case, you will not be able to start the Windows operating system in normal mode. In some cases, an error BOOTMGR is corrupt. In case of damage to the boot loader or boot record, your operating system - whether it is Windows 7, Windows 8 or Windows 8.1 - will issue here bOOTMGR error is missing - press CTRL + ATL + DEL to restart. The MBR contains the primary boot loader code and the hard disk partition table. The MBR may occupy more than one sector, but this is not the case now. When you boot your computer, after checking the hardware, the BIOS reads from the boot hard drive The first sector is 512 bytes of data. His work is closely related to the Master Boot Record (MBR) or the Master Boot Sector (MBS). Starting from Windows Vista and beyond, in Windows 7, Windows 8 and Windows 8.1, a new boot manager (boot manager) - BOOTMGR has been applied. But with the advent of new system BIOS - EFI and UEFI - the old NTLDR no longer meets the requirements. If we look at the evolution of Windows operating systems, then in Windows 2000 and Windows XP, Windows was NTLDR (NT Loader), which can load other operating systems by setting the appropriate boot sector in a separate file. operating system directly after turning on the computer. What is a Windows bootloader? In simplest terms, this is a boot program.
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