what happens when you first turn on your device. It is loaded from the volume boot code of your device’s hard drive, and it enables you to set up the boot environment, i.e. Windows Boot Manager (Bootmgr.exe) is Microsoft’s proprietary Unified Extensible Firmware Interface (UEFI) application. Fixing Boot Configuration Data (BCD) errors.Repairing the master boot code and boot sector.How to use Windows Boot Manager to fix Windows 10 boot errors.Using the Startup Repair tool to repair the Boot Loader.Most common problems during the Boot Loader phase.Enabling and disabling Windows Boot Manager.It is recommended, to use theīCDEdit command " BCDEdit /export" to save a copy of the current system storage before deleting anyĮntries. Please note, in case a still required bootloader entry will be deleted, the related OS won't boot anymore.īe sure, to delete only unwanted and not necessary entries.
This document describes how to remove unwanted entries on Windows 10 using the BCDEdit command. In case there is more than one Windows installation or another type of OS has been installed (for example Linux OS installation) on the computer, additional bootloader entries are created and shown in the boot manager list. BCDEdit synchronizes the firmware namespace object in NVRAM with the system boot configuration data (BCD). On Unified Extensible Firmware Interface (UEFI)-based computers, firmware creates non-volatile random access memory (NVRAM) entries for local devices (such as Optical Disk- or Hardisk drives) when the computer boots.
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