Get the fix to “BOOTMGR is compressed” boot error in Windows XP, Vista, 7 or Windows 8.

Automatically fix the BOOTMGR is compressed error with Easy Recovery Essentials!
See how it works here or Download Easy Recovery Essentials to fix this error

There are no alternative error messages known. The Windows black screens simply shows the following text:

BOOTMGR is compressed

Press Ctrl+Alt+Del to restart

-

Pressing Ctrl+Alt+Del would simply restart the computer and revert back to the error black screen.

This appears if your hard disk has been recently compressed. Users also reported this error after running the defragmentation tool.

BOOTMGR is compressed boot error

The “BOOTMGR is compressed” error.

Fix BOOTMGR is compressed in Windows XP

Windows Setup CD/DVD Required!
Some of the solutions below require the use of the Microsoft Windows setup CD or DVD. If your PC did not come with a Windows installation disc or if you no longer have your Windows setup media, you can use Easy Recovery Essentials for Windows instead. EasyRE will automatically find and fix many problems, and can also be used to solve this problem with the directions below.

Fix #1: Rebuild the master boot record

Windows XP and Vista users can follow the next steps to rebuild master boot record of the boot disk:

  1. Insert your Windows install CD and restart your computer
  2. Press any key when the message appears to boot from your install disk
  3. At the Setup Menu, press R to open the Recovery Console
  4. Enter your Administrator password
  5. Type the next commands when Command Prompt appears:
    fixmbr
    fixboot

Type them exactly in that order: fixmbr first, followed by fixboot. Then restart your computer.

Fix BOOTMGR is compressed with Easy Recovery Essentials

Easy Recovery Essentials (recovery and repair disk) can fix this boot error automatically. It supports Windows XP, Vista, 7 or 8.

  1. Download Easy Recovery Essentials. Choose your version (XP, Vista, 7 or 8) before you go to download
  2. Burn the image. Follow these instructions on how to burn the bootable ISO image very carefully, as making a bootable CD can be tricky!
  3. Boot into Easy Recovery Essentials
  4. Choose Automated Repair option and click Continue
    Easy Recovery Essentials Repairs BOOTMGR is compressed

    Choose “Automated Repair” in Easy Recovery Essentials

  5. Choose your Windows installation drive’s letter (usually C:\) and click on Automated Repair
  6. Easy Recovery Essentials will now begin to fix the error automatically
    Easy Recovery Essentials repairs boot errors

    Easy Recovery Essentials Starts the Process

  7. Once the process is complete, click on Restart
  8. That’s it. The “BOOTMGR is compressed” error is now fixed for any Windows version:
    Windows XP, Vista, 7, 8 Boot Screens

    Windows XP, Vista, 7, 8 Loading Successfully

You can download Easy Recovery Essentials from here.

Fix BOOTMGR is compressed in Windows Vista, 7 or 8

Windows Setup CD/DVD Required!
Some of the solutions below require the use of the Microsoft Windows setup CD or DVD. If your PC did not come with a Windows installation disc or if you no longer have your Windows setup media, you can use Easy Recovery Essentials for Windows instead. EasyRE will automatically find and fix many problems, and can also be used to solve this problem with the directions below.

Fix #1: Run Startup Repair

  1. Insert your Windows install disk
  2. Press any key when you see “Press any key to boot from CD or DVD”
  3. Click Repair your computer after selecting your language, time and keyboard method
  4. Select the drive of your Windows installation and click Next. The standard drive is usually C:\
  5. Select Startup Repair and wait for the process to finish.

Fix #2: Uncheck “Compress this drive”

These steps will uncheck the “Compress this drive to save space” option that’s currently applied to your hard disk.

  1. Boot from the installation DVD
  2. Click on Repair your computer
  3. Next select your Operating System
  4. Click on Load Drives
  5. Browse to your drive, C: (in our case here)
  6. Right click on C: and select Properties
  7. Go to Advanced tab
  8. Uncheck this option: Compress this drive to save space
  9. Restart your computer

Fix #3: Run the compact command

  1. Boot from the install CD
  2. Select your language, time and keyboard method
  3. Click on Repair your computer
  4. Select your operating system when the “System Recovery Options” box appears, but note down the drive’s letter (e.g. F:, G: etc.). In our example this will be C:
  5. Select Command Prompt
  6. Type the following commands, where C:\ is your Windows’ installation drive letter:
    compact /U C:\bootmgr
    compact /U C:\ntldr
  7. Restart your computer

More Information

Support Links

Applicable Systems

This Windows-related knowledgebase article applies to the following operating systems:

  • Windows XP (all editions)
  • Windows Vista (all editions)
  • Windows 7 (all editions)
  • Windows 8 (all editions)
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