The BCDBoot option allows you to quickly add boot options for a Windows-based operating system. When setting up a PC to boot more than one operating system, you may sometimes lose the ability to boot into one of the operating systems. Set up or repair the boot menu on a dual-boot PC Optional: Format your system partition: format (drive letter of your system partition) /qĪdd a boot entry for your Windows partition: bcdboot D:\Windows Use Diskpart to determine which drive letter contains your Windows partition and system partition ( diskpart, list vol, exit). For example, boot to the Windows installation disk and press Shift+F10, or boot to Windows PE ( WinPE: Create USB Bootable drive). If the system partition has been corrupted, you can use BCDBoot to recreate the system partition files by using new copies of these files from the Windows partition.īoot your PC to a command line. New for Windows 10: By default, during an upgrade, BCD elements such as debugsettings or flightsigning are preserved. Specifies that any existing BCD elements should not be migrated. BCDBOOT ] [/m [ object in Windows Boot Manager. The following command-line options are available for BCDBoot.exe. Use /addlast to add it to the bottom of the boot order list. Use the /p option to preserve the existing UEFI boot order. By default, this entry is placed as the first item in the boot list. BCDBoot adds a firmware entry in the NVRAM to point to the Windows Boot Manager.On UEFI PCs, BCDBoot can update the firmware entries in the device’s NVRAM: Use the /d option to preserve the existing boot order. By default, BCDBoot moves the boot entry for the selected Windows partition to the top of the Windows Boot Manager boot order.Use the /m option to retain the values from an existing boot entry when you update the system files.
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