How To Write a New Partition Boot Sector To a Windows 7/8/Vista System Partition, secugenius
1 If the partition
boot sector becomes corrupted or misconfigured in some way, Windows
will not be able to start properly, prompting an error like BOOTMGR is
Missing very early in the boot
process.
2 The solution to a damaged partition boot sector is to overwrite it with a new, properly configured one using the bootrec command.
Important: The following instructions apply to Windows 8, Windows 7, and Windows Vista. Boot sector issues also occur in Windows XP but the solution involves a different process
3 At the prompt, type the bootrec command as shown below and then press Enter:
bootrec /fixboot
The bootrec command will write a new partition boot sector to the current system partition. Any configuration or corruption issues with the partition boot sector that might have existed are now corrected.
4 You should see the following message at the command line:
The operation completed successfully.
and then a blinking cursor at the prompt.
5 Restart your computer.
Assuming that a partition boot sector issue was the only problem, Windows should start normally now. If not, continue to troubleshoot whatever specific issue you're seeing that's preventing Windows from booting normally.
Important: Depending on how you started Advanced Startup Options or System Recovery Options, you may need to remove a disc or flash drive before restarting.
2 The solution to a damaged partition boot sector is to overwrite it with a new, properly configured one using the bootrec command.
Important: The following instructions apply to Windows 8, Windows 7, and Windows Vista. Boot sector issues also occur in Windows XP but the solution involves a different process
3 At the prompt, type the bootrec command as shown below and then press Enter:
bootrec /fixboot
The bootrec command will write a new partition boot sector to the current system partition. Any configuration or corruption issues with the partition boot sector that might have existed are now corrected.
4 You should see the following message at the command line:
The operation completed successfully.
and then a blinking cursor at the prompt.
5 Restart your computer.
Assuming that a partition boot sector issue was the only problem, Windows should start normally now. If not, continue to troubleshoot whatever specific issue you're seeing that's preventing Windows from booting normally.
Important: Depending on how you started Advanced Startup Options or System Recovery Options, you may need to remove a disc or flash drive before restarting.
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