Windows OS Startup Configuration Data Editor

Updated January 2023: Stop getting error messages and slow down your system with our optimization tool. Get it now at this link
  1. Download and install the repair tool here.
  2. Let it scan your computer.
  3. The tool will then repair your computer.

The most difficult part with dual-boot or multi-boot is that the boot manager does not always recognize older operating systems. This may be because older operating systems use a different bootloader type than before Windows Vista or simply because Windows has not assigned a drive name for missing operating systems.

Start configuration data editor (BCD)

The command line tool Bcdedit.exe changes the start configuration data memory. The boot configuration data memory contains boot configuration settings and controls how the operating system is booted. These parameters were previously found in the Boot.ini file (in BIOS-based operating systems) or in non-volatile RAM inputs (in Extensible Firmware Interface-based operating systems). With Bcdedit.exe, you can add, delete, edit and add entries in the boot configuration data memory.

This article focuses on the boot configuration data editor and tries to answer how it can help you, errors such as the operating system not found, the impossibility of detecting secondary and tertiary operating systems in case of multiple starts and similar errors.

Why switch from Boot.ini to BCD

January 2023 Update:

You can now prevent PC problems by using this tool, such as protecting you against file loss and malware. Additionally it is a great way to optimize your computer for maximum performance. The program fixes common errors that might occur on Windows systems with ease - no need for hours of troubleshooting when you have the perfect solution at your fingertips:

  • Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.


BCD was developed to provide an improved mechanism to describe boot configuration data. When developing new firmware models, an extensible and interoperable interface was needed to abstract the underlying firmware. This new design forms the basis for a variety of new features in Windows Vista, Windows 7, Windows 8, Windows 10, as the startup repair tool and multi-user installation shortcuts.

What is the BCD Editor

The BCD Editor is provided as a graphical interface in Windows. There are not many options, but you can repair the boot manager and repair the main boot record from the graphical user interface.

The graphical user interface also allows you to solve problems where bootmgr is missing in some cases.

BCD register location

The Boot Configuration Data Store contains boot configuration parameters and controls how the operating system is booted.

The BCD register is located in the ootcd folder of the active partition.

For EFI-based systems, the default BCD register location is on the EFI partition.

Read: How to save and restore a BCD file under Windows.

BCD editor command line version

BCD editor command line version is very powerful and can be used for a variety of functions :


  • Deleting entries from a BCD memory
  • Get a list of active parameters
  • Get entries of a specific type and
  • Apply a global change


To see, what else you can do with BCDEdit. exe, type bcdedit.exe /? at the command prompt. All the options and operations you can perform with the BCD editor from the command prompt are listed.

If you intend to use two or more operating systems, note the following :

  1. Install Windows Vista or later on another partition. Usually, each operating system should have its own partition, because otherwise common folders like Windows, programs, etc. can cause conflicts and crash your computer. However, if you plan to use older operating systems, first install the operating systems before Windows Vista so they can continue to use boot.ini, and then

    Expert Tip: This repair tool scans the repositories and replaces corrupt or missing files if none of these methods have worked. It works well in most cases where the problem is due to system corruption. This tool will also optimize your system to maximize performance. It can be downloaded by Clicking Here