How to Fix MBR for Windows 8 When Operating System Cannot Boot

MBR is the master boot record of a hard disk. It is created on the first partition when you first install Windows. MBR consists of three parts, i.e. Boot Loader, Partition Table and Magic Number. Boot loader is a program that loads an operating system when a computer is turned on. Partition table records partition information on local disks. Magic number(0xAA55/0x55AA) marks the device as a valid bootable media. An invalid magic number indicates a corrupted or missing MBR. Master Boot Sector contains 512 bytes in total, of which the boot loader takes up 446 bytes, partition table 64 bytes, and magic number 2 bytes. If the MBR is damaged, you won’t be able to boot into Windows.

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Created by luoluo 5 years 40 weeks ago – Made popular 51 years 44 weeks ago
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