All about BOOTMGR Files

The BOOTMGR file type is primarily associated with Windows Boot Manager.

BOOTMGR	File extension: BOOTMGR
	File type:	system boot file

What is a BOOTMGR file

BOOTMGR files mostly belong to Windows Boot Manager. BOOTMGR files are system boot files used by Windows Boot Manager to start the operating system.
These files are not user data but are essential components in the boot process. They are stored in a protected area of the system and loaded during startup.
Key Functions:

Initialize and load boot configuration data

Locate and verify the Windows system partition

Coordinate with other boot files such as .BCD and legacy .NTLDR files

This file is in a binary format and is not meant to be opened here like a document. If you need to view its raw content, you can use a hex editor. However, any changes to it could prevent Windows from booting normally.
FilExt.com note: For additional details, see the BOOTMGR page.

How do you open BOOTMGR files?

You need a suitable software like Windows Boot Manager to open a BOOTMGR file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your BOOTMGR file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a BOOTMGR file directly in the browser:. Just drag the file onto this browser window and drop it.

Online BOOTMGR Text Viewer

Choose your .bootmgr file to analyze

or drag and drop it here

Online File Viewer

✈

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

Programs that open and convert BOOTMGR files:

Windows Boot Manager
See the previous paragraphs to learn more about the main application. BOOTMGR files are often referred to as Windows Boot Manager systems because this type of file is primarily created or used by this software.
Microsoft Boot Manager (Windows Boot Manager) by Microsoft
The BOOTMGR extension is used by read-only files. It stands for Windows Boot Manager and it is a small piece of software program that is usually loaded from the Volume Boot Code. The Volume Boot Code is a part of the Volume Boot Record. The BOOTMGR file enables the Windows operating system to start. This BOOTMGR file is usually hidden in the "Active" partition that's inside the root directory of the disk management files. The BOOTMGR file could also be located in the C: drive which is the primary driver of your computer system. You can also disable the BOOTMGR file if necessary.

BOOTMGR file format details:

The file format, which is the arrangement and type of data in a file, determines which program can open the file. The file format can be deduced from the file extension and the signature. If the file extension or signature does not match the file format, errors will occur when opening or editing the file. So a detailed analysis of a file is vital in order to determine the format and the associated program. Below is our analysis of the BOOTMGR files:

An BOOTMGR file mainly uses a defined BOOTMGR format. The two most common formats are as follows:

90% of all BOOTMGR files start with the magic bytes E9 D5 01 EB 04 90 00 00, which are always the first bytes of this file format. If you open these files in a text editor, you will see only illegible characters. The files are often between 380 KB and 410 KB in size. The file type is old but is used even today. The following keywords are characteristic: fPfRfQfS and fSfSP. An example of a file name is bootmgr..

All the rest of the BOOTMGR files (10%) have different formats. Just click the "Choose your .bootmgr file to analyze" button on this page to find out what your BOOTMGR file is.

Technical Data for BOOTMGR File Extension

File classification:

System

Related files:

ntldr, bcd, sys, efi, bootnxt, grldr, bootmgr1, sdi, mui, wim, boot, exe, inf, copy0, iso, bin, dat, log1, mbr, man, txt

a bootmgr system boot file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with BOOTMGR files

Associate the BOOTMGR file extension with the correct application.
Update your software that should actually open system boot files. Because only the current version supports the latest BOOTMGR file format. Search, therefore, e.g. on the manufacturer website after an available Windows Boot Manager update.
To make sure that your BOOTMGR file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .BOOTMGR file online - secure, fast, and no downloads needed.