Get the fix to “BOOTMGR is compressed” boot error in Windows XP, Vista, 7, 8 or 8.1.

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 the Ctrl + Alt + Del combination of keys 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 with Easy Recovery Essentials

Easy Recovery Essentials is guaranteed to fix the “BOOTMGR is compressed” error automatically using its built-in Automated Repair option. EasyRE is currently available for Windows XP, Vista, 7 and 8 and can be downloaded and created on any PC.

  1. Download Easy Recovery Essentials. Make sure to note your Windows version (XP, Vista, 7 or 8) before you download EasyRE. This guide can help you identify what version of Windows you have installed.
  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! Alternatively, these instructions explain how to create a bootable EasyRE recovery USB stick/drive.
  3. Boot up your PC from the Easy Recovery Essentials CD or USB you created.
  4. Once EasyRE is running, choose the “Automated Repair” option and click Continue.
    EasyRE Home

    Choose “Automated Repair” in Easy Recovery Essentials

  5. After EasyRE scans your computer’s drives, identify and select the drive letter for your Windows installation from the list, and then click on the Automated Repair button to begin.
    EasyRE displays a list of found Windows operating systems

    Choose the drive associated with the Windows installation you’re trying to repair.

  6. Easy Recovery Essentials will start analyzing the selected drive for problems. EasyRE will test for and attempt to automatically correct errors with the disk, partition, bootsector, filesystem, bootloader, and registry. No intervention is required, as EasyRE’s repair is fully automated:
    EasyRE: Automated Repair

    Easy Recovery Essentials searches for errors and makes corrections to the selected Windows installation.

  7. Once the process is complete, EasyRE will report its findings. Click on the Restart button to reboot your PC and test the changes.
  8. The “BOOTMGR is compressed” error should now be fixed as your PC begins to load:
    EasyRE: Automated Repair

    Windows, booting up successfully.

You can download Easy Recovery Essentials from here.

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 in Windows Vista, 7, 8, 8.1

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

Linked Entries

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)
  • Windows 8.1 (all editions)
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