How to Fix BOOTMGR is Compressed: Quick Solutions to Resolve the Issue

In the world of computers, encountering errors is not uncommon, and one such error that can cause panic and frustration is the “BOOTMGR is Compressed” message. This error occurs when the BOOTMGR file, responsible for loading Windows, gets compressed, leading to an inability to boot the system. In this article, we will explore some quick and effective solutions to resolve this issue and get your computer up and running smoothly again.

Understanding The “BOOTMGR Is Compressed” Error

The “BOOTMGR is compressed” error is a common issue that occurs when the BOOTMGR file, responsible for the booting process in Windows, becomes compressed. This can happen due to various reasons such as incorrect system settings, malware infection, or accidental compression.

When this error occurs, the computer is unable to boot up properly, resulting in an error message on the screen. It can be a frustrating situation, but fortunately, there are several solutions available to resolve this issue.

In this article, we will explore different methods to fix the “BOOTMGR is compressed” error. We will discuss how to check for signs of a compressed BOOTMGR, resolve the issue through the command prompt, repair it using a Windows installation disc, utilize the Windows Recovery Environment, and even use third-party tools for recovery.

By following the steps provided, you can quickly resolve the “BOOTMGR is compressed” error and prevent future occurrences, ensuring a smooth and uninterrupted booting process for your Windows operating system.

Checking For Signs Of A Compressed BOOTMGR

When encountering the “BOOTMGR is Compressed” error, it is crucial to first determine whether the BOOTMGR file is truly compressed or not. This subheading will guide you through the process of identifying signs of a compressed BOOTMGR.

One of the clear indications of a compressed BOOTMGR is the appearance of an error message on your computer screen stating “BOOTMGR is Compressed. Press Ctrl+Alt+Del to Restart.” Additionally, you may notice that your computer fails to start up properly or continuously restarts after displaying the error message.

To confirm whether the BOOTMGR file is compressed, you can use the Command Prompt utility. Simply boot your computer from an installation disc or a bootable USB and access the Command Prompt. Once there, type in the command “dir c:” and press Enter. Look for the BOOTMGR file in the list displayed. If the file is followed by “Compressed“, it confirms that the BOOTMGR file is compressed.

By understanding the signs of a compressed BOOTMGR, you can accurately diagnose the issue and proceed with the appropriate solution in order to resolve the error effectively.

Resolving The Issue Through Command Prompt

When encountering the “BOOTMGR is Compressed” error, one potential solution is to use the Command Prompt to fix the issue. This method involves entering specific commands to decompress the BOOTMGR file and resolve the error.

To begin, you will need to access the Command Prompt. This can be done by inserting a Windows installation disc or a bootable USB drive and booting from it. Select the option to repair your computer and choose the Command Prompt from the available options.

Once in the Command Prompt, you will need to navigate to the location of the compressed BOOTMGR file. This can typically be found in the C: drive under the “System Recovery Options” folder. Using the “CD” command, change the directory to the folder where the compressed file is located.

Next, run the command “compact /U C:BOOTMGR” to decompress the BOOTMGR file. This command will expand the compressed file back to its original state.

After executing the command, restart your computer and check if the “BOOTMGR is Compressed” error has been resolved. If not, further troubleshooting may be required.

Repairing The Compressed BOOTMGR Using A Windows Installation Disc

If you encounter the “BOOTMGR is Compressed” error and the command prompt method didn’t work for you, using a Windows installation disc can be an effective solution. Here’s how:

1. Insert your Windows installation disc into the CD/DVD drive and restart your computer.
2. Press any key when prompted to boot from the installation disc.
3. Select your language preferences, and then click “Next.”
4. Click on the “Repair your computer” option at the bottom left corner of the screen.
5. In the System Recovery Options, choose the operating system you want to repair, and then click “Next.”
6. Click on “Command Prompt” to open the command prompt window.
7. Type the following command and press Enter: “bootrec /fixboot”
8. Wait for the command to complete and then restart your computer.
9. If the issue persists, repeat steps 1-4, and this time select “Startup Repair” instead of “Command Prompt.”
10. Follow the on-screen instructions to complete the repair process.

Using a Windows installation disc can provide a more thorough repair for the compressed BOOTMGR issue when other methods fail.

Using The Windows Recovery Environment To Fix BOOTMGR Compression:

When encountering the “BOOTMGR is Compressed” error, one effective solution is to use the Windows Recovery Environment (WinRE) to resolve the issue.

To begin, restart your computer and access the WinRE by tapping the F8 key repeatedly during the boot process until the Advanced Boot Options appear. From here, select the “Repair Your Computer” option.

In the next window, choose the operating system you want to repair and click on the “Next” button. Select the “Command Prompt” option to open the command prompt window.

Once the command prompt window appears, type the following command and press Enter: “compact /U C:Bootmgr”. This command will uncompress the BOOTMGR file and fix the issue.

After executing the command, restart your computer and check if the “BOOTMGR is Compressed” error has been resolved. If the error persists, you may need to try alternative methods such as using a Windows installation disc or utilizing third-party tools for further recovery options.

Using Third-Party Tools For BOOTMGR Compression Recovery

When traditional methods fail to fix the “BOOTMGR is Compressed” error, you can consider using third-party tools specifically designed for BOOTMGR compression recovery. These tools offer advanced features and a user-friendly interface to simplify the recovery process.

One recommended tool is “Easy Recovery Essentials” by NeoSmart Technologies. This powerful software is designed to fix various Windows-related issues, including BOOTMGR compression errors. With this tool, you can easily create a bootable USB or DVD and use it to access the Windows Recovery Environment.

Another popular tool is “MiniTool Partition Wizard,” which provides a comprehensive set of features to manage and repair your computer’s partitions. This tool allows you to easily recover the compressed BOOTMGR by rebuilding the boot configuration and fixing any partition-related issues.

Before using any third-party tool, ensure that it comes from a trusted source and has positive user reviews. Also, follow the instructions provided by the tool’s developers carefully to avoid any potential risks or data loss.

Remember, using third-party tools should be your last resort if all other methods have failed.

Preventing Future BOOTMGR Compression Issues

The “BOOTMGR is Compressed” error can be a frustrating issue to deal with, but there are steps you can take to prevent it from happening again in the future. Here are some tips to help you avoid encountering this error:

1. Disable the “Compress this drive to save disk space” option: One common cause of the compressed BOOTMGR error is enabling the disk compression feature. To prevent this issue, make sure this option is disabled for all drives on your computer. Right-click on each drive, select “Properties,” and uncheck the “Compress this drive to save disk space” option.

2. Keep your operating system up to date: Regularly installing Windows updates ensures that you have the latest bug fixes and security patches. These updates can help prevent issues like the BOOTMGR compression error from occurring.

3. Avoid using third-party disk compression tools: While third-party tools may offer additional features, they can sometimes cause compatibility issues with the Windows operating system. It’s best to rely on built-in Windows features rather than using external tools, especially when it comes to disk compression.

By following these preventive measures, you can minimize the likelihood of encountering the “BOOTMGR is Compressed” error in the future and ensure a smoother and more reliable operation of your computer.


1. Why am I seeing the error message “BOOTMGR is Compressed” on my computer?

The error message “BOOTMGR is Compressed” is usually displayed when the boot manager file on your computer’s hard drive has been compressed. This can occur due to various reasons, including accidental compression by the user or a malware infection.

2. How can I fix the “BOOTMGR is Compressed” error?

To resolve the “BOOTMGR is Compressed” error, you can follow some quick solutions. One method is to use the Windows installation disc or a bootable USB drive to access the Command Prompt and use the “bootrec” command to rebuild the boot manager. Another solution is to use a third-party data recovery tool to decompress the boot manager file and restore it to its original state.

3. Are there any precautions I should take before attempting to fix this error?

Before attempting to fix the “BOOTMGR is Compressed” error, it is essential to back up any important files or data on your computer’s hard drive. This is important to prevent any potential data loss during the repair process. Additionally, ensure that you have a reliable antivirus software installed and up to date to protect your system from potential malware threats.

4. What should I do if the “BOOTMGR is Compressed” error persists after trying the solutions?

If the “BOOTMGR is Compressed” error still persists after attempting the quick solutions mentioned, it is recommended to seek professional assistance. There may be underlying issues with your computer’s hardware or operating system that require advanced expertise to diagnose and resolve. Contacting a computer technician or reaching out to the customer support of your computer’s manufacturer can help you get further guidance.

Wrapping Up

In conclusion, fixing the BOOTMGR is compressed issue is crucial to ensure the proper functioning of a computer system. The article has provided quick and effective solutions to resolve this issue, including using the Windows Recovery Environment and performing a system restore. By following these steps, users can easily overcome the problem and restore their system to a fully operational state. It is important to note that regular maintenance and preventive measures, such as updating software and keeping backups, can help prevent such issues from occurring in the future.

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