How to Repair Bootmgr is Compressed Error

David Darlington

Jul 17, 2024 • Filed to: Windows Computer Solutions • Proven solutions

Similar to the NTLDR for Windows XP and earlier versions, BOOTMGR the abbreviation for Boot Manager helps operate the system menu to manage unique systems.

The "BOOTMGR is compressed" error is very common, because of which you might not be able to enter the desktops of any of the operating systems. The error may be as follows:

BOOTMGR is missing. Press Ctrl+Alt+Del to restart

Your windows installation disc provides an option to fix this error. All you have to do is install the DVD, and select "Repair my Computer". Upon this, you will have OS installation, and after browsing into "Load Drivers" all you have to do is deselect the "Compress my Computer" option! Apply the changed settings onto your files and subfiles, and then reboot your system, the error will hopefully be gone now.

Repair a "BOOTMGR is Compressed" Error with Windows Installation DVD or a Bootable Media

Your Windows Installation Disc or bootable media provides system recovery options to fix a "BOOTMGR is Compressed" error.

1. Boot from the Windows Installation DVD or bootable media. Set CD/DVD-ROM/USB bootable media as the first boot device if not set already.

2. Select "Repair My Computer"

3. Select the OS installation; click the "Load Drivers" button to bring up a drive browser.

4. Right-click on the system drive, and deselect "Compress This Drive", which should still be selected (That's why the "BOOTMGR is Compressed" error has occurred).

5. Click "Apply", in the pop-up dialog box, choose "Apply to Subfolders/files".

6. Reboot your computer and the "BOOTMGR is Compressed" error should be repaired.

By the way, ntldr compressed error also occurs sometimes.

Recover Lost Data When You Failed to Boot Computer with All Above Methods

As do other errors in our computers, this error is often seen as well. It is highly likely that when this error is developed into your computer, the system fails to boot up. Even at times when you're trying to fix the issue with the above solutions, you can't make it out.

If you do encounter a failure of booting the computer after you've fixed the "BOOTMGR is compressed" error, Recoverit Data Recovery can help you out. It helps you to create a bootable media and recover data on the unbootable computer. You can follow the below steps to go on:

1. Open Recoverit and tap the "Recover from Crash Computer" icon. Click the "Start" button to commence the process.

2. The next step will require that you choose a mode to create a bootable drive. Two options will appear on your screen that is USB bootable or CD/DVD bootable drive. Choose any one and tap the "Create" tab to continue.

3. A window will pop up, requesting you to format your computer. It will remind you to back up your data before formatting. To proceed tap "Format Now".

4. Do not remove the USB Flash drive or CD/DVD when it starts creating a bootable drive. The next step you should take will pop up. Follow the steps to proceed or take a look at the full guide to commence data recovery.

5. The whole process will take a while. However, 3 steps about data recovery will pop up on the screen.

6. You must alter your computer boot sequence before you commence the data recovery process from an unbootable Windows 10. Simple instruct the system to boot from the bootable media you created a while ago. Reboot your computer; tap F12 to enter the BIOS. Kindly note that the BIOS key for each system differs. Take a look at more details regarding how to set the computer to boot from a USB drive.

7. Recoverit starts working automatically as soon as the booting process from the bootable drive is completed. Scroll to the hard disk, copy data or tap recover lost data from Windows 10. There is no need to border about how to regain data from unbootable Windows 10. You can always reach out to us to help you with such issues.