The Windows computers which are based on Intel depend on BIOS (Basic Input/Output System) for loading and executing bootstrap code. The ‘int 0×19′ generated by Bootstrap routine of BIOS loads the first sector of hard drive in memory at 0000:7C00H segment address.
MBR (Master Boot Record), the first physical segment on hard drive , contains bootstrap loader code. Sometimes the system does not boot due to missing boot code and the system becomes inaccessible which makes all your data, stored on hard drive, inaccessible and cause serious data loss situations. In such circumstances, you need to perform hard drive recovery to fix the problem.
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