In this situation, the computer starts by using Windows NT Loader (NTLDR) instead of Windows Boot Manager (Bootmgr.exe).

The boot sector was replaced with a nonstandard Windows Vista or Windows 7 boot sector.Īn earlier Windows operating system was installed after Windows Vista or Windows 7 was installed. Use this option if one of the following conditions is true: This option writes a new boot sector to the system partition by using a boot sector that's compatible with Windows Vista or Windows 7. Use this option when you must resolve MBR corruption issues, or when you have to remove nonstandard code from the MBR.

It does not overwrite the existing partition table. This option writes a Windows 7 or Windows Vista-compatible MBR to the system partition. Use the option that's appropriate for your situation. The Bootrec.exe tool supports the following options. For information about how to do this, see the documentation that was included with the computer, or contact the computer manufacturer. Note To start the computer from the Windows Vista or Windows 7 DVD, the computer must be configured to start from the DVD drive. In the System Recovery Options dialog box, click Command Prompt. Select the operating system that you want to repair, and then click Next. Select a language, a time, a currency, a keyboard, or an input method, and then click Next. Put the Windows Vista or Windows 7 media in the DVD drive, and then start the computer.

To run the Bootrec.exe tool, first start the Windows RE: You can also use the Bootrec.exe tool to troubleshoot a Windows Boot Configuration Data file is missing required information error. This article talks about how to use the Bootrec.exe tool in the Windows RE to troubleshoot and repair the following items in Windows Vista or Windows 7: If this does not resolve the issue, or if you have to manually troubleshoot additional issues, use the Bootrec.exe tool. When you use the Recovery Environment (Windows RE) to troubleshoot startup issues, first try the Startup Repair option in the System Recovery Options dialog box.

Bootrec commands