How To Use Bootrec In Windows 10

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Summary

When you utilise the Recovery Environs (Windows RE) to troubleshoot startup issues, first effort the Startup Repair option in the System Recovery Options dialog box. If this does not resolve the upshot, or if you have to manually troubleshoot additional bug, use the Bootrec.exe tool. This article talks near how to use the Bootrec.exe tool in the Windows RE to troubleshoot and repair the following items in Windows Vista or Windows vii:

A master kicking record (MBR)
A kick sector
A Kicking Configuration Data (BCD) store

You can also use the Bootrec.exe tool to troubleshoot a Windows Boot Configuration Data file is missing required information error.

How to run the Bootrec.exe tool

To run the Bootrec.exe tool, first start the Windows RE:

Put the Windows Vista or Windows 7 media in the DVD drive, and and so start the computer.
Press a key when you are prompted.
Select a language, a time, a currency, a keyboard, or an input method, and and so click Next.
Click Repair your calculator.
Select the operating system that you lot want to repair, and then click Adjacent.
In the Organisation Recovery Options dialog box, click Command Prompt.
Blazon Bootrec.exe, and then printing Enter.

Information icon Note To start the figurer from the Windows Vista or Windows seven DVD, the computer must exist configured to start from the DVD drive. For information virtually how to do this, see the documentation that was included with the computer, or contact the computer manufacturer.

The Bootrec.exe tool supports the following options. Utilise the pick that'due south advisable for your situation.

/FixMbr

This pick writes a Windows 7 or Windows Vista-uniform MBR to the organization partition. It does not overwrite the existing partition table. Use this selection when yous must resolve MBR corruption issues, or when yous have to remove nonstandard code from the MBR.

/FixBoot

This option writes a new boot sector to the system partition past using a boot sector that's compatible with Windows Vista or Windows 7. Use this option if 1 of the following conditions is true:

The kick sector was replaced with a nonstandard Windows Vista or Windows 7 boot sector.
The boot sector is damaged.
An earlier Windows operating system was installed subsequently Windows Vista or Windows vii was installed. In this state of affairs, the figurer starts by using Windows NT Loader (NTLDR) instead of Windows Kick Manager (Bootmgr.exe).

/ScanOs

This choice scans all disks for installations that are compatible with Windows Vista or Windows 7. It also displays the entries that are currently not in the BCD shop. Use this option when there are Windows Vista or Windows seven installations that the Boot Manager menu does not listing.

/RebuildBcd

This option scans all disks for installations that are compatible with Windows Vista or Windows 7. Additionally, it lets y'all select the installations that y'all want to add to the BCD store. Utilise this choice when yous must completely rebuild the BCD store.

Information icon Note Utilise the Bootrec.exe tool to troubleshoot a "Bootmgr Is Missing" mistake. If rebuilding the BCD store doesn't resolve the startup issue, you tin export and delete the BCD store and then run this option once more. Past doing this, you make sure that the BCD store is completely rebuilt.

To do this, type the following commands at the Windows RE command prompt:

bcdedit /consign C:\BCD_Backup
c:
cd boot
attrib bcd -s -h -r
ren c:\boot\bcd bcd.quondam
bootrec /RebuildBcd

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