“bootmgr is compressed” in Windows 7

The dreaded message “bootmgr is compressed” is another bugger and requires some work on your side.

Bootmgr is compressed: Windows 7

I happen to run into a lot of errors in Windows 7 due to file compression. I’m not saying that it’s bugged, I’m just saying that it’s causing problems for my own setup and is even slowing it down.

Anyway, if you run into this error, your bootmgr file is probably located on another drive than your Windows 7 main partition. Thus, you are receiving the error. The bootmgr file will be written to the BIOS default HDD, but if it’s on another hard drive then it can get compressed.

So, what can we do about the error “bootmgr is compressed”?

Repair your computer

Press F8 during boot up to get a list of all start-up options. Choose “Repair your computer”:

Windows 7 Repair your computer

A list of your installed OS’s will appear:

Windows 7 System Recovery Options

Select Operating System

Method 1: Repair bootmgr via Command Prompt

Open the command prompt.

Windows 7 System Recovery Command Prompt

Next, simply enter the following command to fix your boot record:


In case your master boot record has been damaged as well, I would also run


If that doesn’t solve the problem, you can also try to run the following commands to re-create your bootmgr file. You are basically creating a temporary bootmgr file and then replacing it with the original one:

Each command has to be on a separate line:

expand bootmgr temp
attrib bootmgr -s -r -h
del bootmgr
ren temp bootmgr
attrib bootmgr -a +s +r +h

I would also recommend to uncheck the option “compress to save disk space” for each hard drive and partition. Mainly, because it can cause problems like this one and it is slowing down your PC eventually.

Method 2: Repair bootmgr via “Startup Repair”

Theoretically, Windows 7 should be able to find and fix this error. If you click on “Startup Repair” instead of Command Prompt, then Windows will scan your system for common errors and will hopefully figure out that your bootmgr is broken.

Windows 7 System Recovery Command Prompt

Check disk for errors

Another error why you are receiving the “bootmgr is missing” error after installing Windows 7, might be that your hard drive has disk errors. It is always a good idea to also run the command

chkdsk C:\ /f /r

This might take some time, depending on the size of your hard drive, but it is necessary to verify that there are no corrupted files on your disk.

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- Cheers!

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Written by:
Oliver is the founder and lead editor of this site. He is interested in finding new ways to break Windows, find common errors and help others to fix them. Aside from that, he loves to fully customize systems with Rainmeter and Dreamscene, find out more about ancient civilizations like the Chachapoya, sharpen his digital photography skills and create software with a small group of selected developers. If you would like to connect with him to discuss anything, send him a mail!

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20 Responses to “bootmgr is compressed” in Windows 7

  1. Orange Community Approved Comment:
    Ray said:

    I received the Bootmgr is compressed error on my hp laptop. I recently upgraded to Windows 7 and I was compressing my C: and this is when all this chaos happened. I am trying to boot my laptop up with my installation disk but for some reason my computer won’t take me to the boot menu and shoots me back to that same error again. Any suggestions on what I’m doing wrong?

  2. Orange Community Approved Comment:
    sOliver said:

    Hit DEL to get into the BIOS and change your boot order so that the PC will boot from DVD FIRST. Please look into your motherboard manual to learn more about this.

    Then your PC will boot from DVD and you can repair the bootmgr.

  3. Orange Community Approved Comment:
    azriel said:

    i can’t open my computer. everytime i open it it said BOOTMGR is compressed what should i do?

  4. Orange Community Approved Comment:
    mike said:

    I’ve gone into the Bios and set the boot order, and it trys to run the disk (I can hear it spinning). But still the same error.

  5. Orange Community Approved Comment:
    james ditto said:

    even pressing the F8 button it is not taking or giving me the option to r5epair my computer.if i insert the repair disk it loads and responds by saying ***stop0x0000000A5 etc.hellllllllp.

  6. Orange Community Approved Comment:
    Dark Angels said:

    Help me!
    I pressed f8 it still desnt open to repair

  7. Orange Community Approved Comment:
    sOliver said:

    Dark Angels, please read this How to get into safe mode without F8.. please read your motherboard manual too. Then when you know the key to get the list of startup options, select Repair your computer and follow the rest above.

  8. Orange Community Approved Comment:
    Hussain said:

    Thank you sOliver :D

    The computer’s DVD Drive doesn’t open and the DVD RW drive didn’t read discs, but after changing the boot order, it allowed to format the computer and re-install Windows XP.

  9. Orange Community Approved Comment:
    Phanna said:

    pleas help!
    i pressed F8 but it still doesnt open to repair

  10. Orange Community Approved Comment:
    deddi said:

    Ctrl+Altr+Del doesn’t work to restart my machine, so what should I do than? how about my data? is it going to be lost?

  11. Orange Community Approved Comment:
    samuel from southren sudan said:

    If all instruction mentioned above doesn’t work go to computer C: \ look for properties of C partition if you make some change to <>
    Uncheck it from repair mode and then restart your computer

  12. Orange Community Approved Comment:
    nam said:

    Computer does not go any further from BOOMGR is compressed screen. F8 does not help – not working. I have no disk. What do I do?

  13. Orange Community Approved Comment:
    PKPurvis said:

    I’ve recently encountered this same problem… but when I get into the cmd prompt and try to use the /fixmbr and /fixboot commands.. it tells me that these are not valid commands to be used…

    It starts in X:sources> and I’ve tried changing to C: and D: to make it recognize the commands but it still does not… Any suggestions?

    When I run startup repair it tells me that no problems could be detected.

  14. Orange Community Approved Comment:
    sOliver said:

    PKPurvis, try to boot into safe mode and then launch cmd.exe

    If it doesn’t work, try to use X:sources> bootrec.exe /fixmbr

    It it doesn’t work, download a boot disc on your laptop which is capable of booting into command prompt / DOS

    Still not working? Add a new HDD or download a LIVE CD (Ubuntu) and try to run over some tools on your “other” broken hard drive

    Hopefully you will be able to fix the bootmgr is compressed message by now.

  15. Orange Community Approved Comment:
    Edson said:

    thnx to sOliver, i was also getting the same problem, a message bootmgr is compressed. I tried to go to command prompt and just type bootrec.exe/fixmbr and i got a msg Operation completed successfully. I restarted and it worked.

  16. Orange Community Approved Comment:
    Omar said:

    my problem is.. when i start my computer and press F8 while booting the list of all start-up options is not showing.. i would be very thankful if you can help me with my problem.. thanks

  17. Orange Community Approved Comment:
    Omar said:

    ..and one thing more my dvd drive cannot read the bootable win 7 disk… pls pls pls… help.. God bless

  18. Orange Community Approved Comment:
    Ldee said:

    hi guys, i had a similar problem just some days back…i needed to copy a movie on my hdd and got just 6gb so i decided to compress my hdd to free up space and when i rebooted my system i got crazy alert dat my bootmgr is compressed
    press Alt Ctrl Del to restart
    well all i did was to first ve a copy of win 7 ultimate on my pen drive,it comes in handy when roms fail to function especially when u nid dem the most, i simply hit my F12 and boot from usb,
    i click on repair my computer
    when my system recovery tool loaded i clicked on next and then command prompt…now it usually loads to X:sources> so i used the cd/ to goto its root directory and den c: to change to c: drive now incase it fails to change den it simply means ur drive is kinda lock so do dis
    X:sources>chkdsk c:/r
    dis calls widows to repair ur c: drive and thus ask u to dismount it after that try again to move to c:
    next from ur prompt…c:/>bootrec /fixmbr
    c:/>bootrec /fixboot
    c:/>bootrec /rebuildbcd
    c:/>expand bootmgr….
    reboot ur system and your done…hope it works for u.

  19. Orange Community Approved Comment:
    mihai said:

    hey guys i have a problem with BOOTMGR, my little brother made a disk compresion on the Windows drive and after 10 min its shut down the laptop, when i got home and opend it i got the eror BOOTMGR is compressed press ctrl alt delete to restart, i tried to open with f8 and nothing happend f5 doesnt work, nothing Works, i tried with Windows dvd, usb but stiil nothing happens any ideea someone pls

  20. Orange Community Approved Comment:
    Oliver Krautscheid said:

    Mihai, have you tried to look into your motherboard manual to see what key you need to press to open the advanced boot options


    Also read this:

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