Problem: So I’ve decided to turn off compression(My Computer -> Select a Drive -> Right Click “Properties”) to speed up my computer. Compression saves disk space but it seems to slow down my computer whenever it’s accessing massive amount of files.

I was prompted to restart my PC so I did, I was then greeted by an error that says:


Press Ctrl+Alt+Delete to Restart


There are 4 (possible) fix for this problem.

Option #1: Boot from your Windows Vista DVD and select Repair your Computer -> Startup Repair.
Option #2: Boot from your Windows Vista DVD and select Repair your Computer -> Command Prompt, execute the following commands: bootrec /fixboot bootrec /fixmbr Reboot.
Option #3: At the prompt to select your OS installation, click the button that says ‘Load Drivers’. This should bring up a explorer-style drive browser.Then just right-click on the drive you tried to compress, and deselect ‘Compress this Drive’, which should still be ticked on. Hit apply, and apply to subfolders/files. Reboot.
Option #4: Boot from your Windows Vista DVD and select Repair your Computer -> Command Prompt, in the command prompt, execute the following commands by typing them and pressing enter for each line: c: expand bootmgr temp attrib bootmgr -s -r -h del bootmgr ren temp bootmgr attrib bootmgr -a +s +r +h Reboot.(If the 2nd line fail, go back to 1st line and replace C with the drive letter of where your windows is installed.) -OR- execute the following where C is where your windows is installed: (thank you Liviu from for sending this in) compact /U C:\bootmgr compact /U C:\ntldr

That’s it! Hope that helped you out. Make sure you are wanting to buy youtube views fast for your videos if you want.

90 Comments on “How to: Fix “BOOTMGR IS COMPRESSED” error”

  1. 1 Jun Marcelo said at 5:20 PM on July 1st, 2009:

    still the same message : BOOTMGR is compressed.

  2. 2 Cyber Valdez said at 7:27 AM on July 3rd, 2009:

    Did you try doing each options? Option #3 works best in most cases.

  3. 3 Mary Kaye said at 6:02 AM on July 31st, 2009:

    THANK YOU!! THANK YOU!! THANK YOU!! I had just purchased an HP mini and decided (not a good idea) to compress my files as there is not allot of disk space…low and behold, I screwed up and got the dreadful: BOOTMGR is compressed…..

    I borrowed an external CD/DVD drive from work, printed your instructions from this site, went home…and low and behold it fixed it, and very quickly I might add.

    Can’t thank you enough for your expertise. I had called HP support, and they were no support at all. I swear he was reading pages from somewhere, and had no clue (also sounded like not in US either). So thanks for your advice…and I will NEVER compress again!!


  4. 4 Cyber Valdez said at 8:02 AM on July 31st, 2009:

    @Mary the call was probably relayed to a call center where they are just reading possible solutions.

    oh and as for compression, it’s best to do it after a fresh install.

  5. 5 robert said at 12:43 AM on August 5th, 2009:

    wicked option 2 worked for me thanks very much….and this helped with the message i recieved saying boot mgr is compressed in windows vista i tried only the option 2 and it worked a treat..

  6. 6 silv said at 3:53 AM on August 12th, 2009:

    Thank you!

    Option #2 worked for me.

  7. 7 sal said at 10:47 PM on August 20th, 2009:

    does anyone know the factory default password its asking for during this process?

  8. 8 rolf said at 4:57 AM on August 23rd, 2009:

    my VISTA business came pre-installed. I have no VISTA disk.

    How can I fix “BOOTMGR is compressed” without a VISTA CD???

  9. 9 rolf said at 2:34 AM on August 24th, 2009:

    why does the “compress” option even exists if it inevitably results in the “BOOTMGR is compressed” failure that disables the computer totally? I feel duped by Microsoft into buying a product – VISTA – that is not fit for the intended use.

  10. 10 Cyber Valdez said at 1:15 AM on August 26th, 2009:

    @rolf Yes, definitely it was a problem on their part. If you legally own it, then you may want to download the product somewhere or borrow it from someone and use it to recover your pc, you will only need it for it’s bootdisk anyway.

  11. 11 rolf said at 8:17 AM on August 26th, 2009:

    Great Information! Thank you. [you aved me from feeling like an idiot!] Why doen’t Microsoft offer help on their Website?

    Now,what do I nedd to get just a “bootdisk” and is my machine going to boot from USB or CD?

    Thank you very much.

  12. 12 dan3 said at 3:22 AM on August 27th, 2009:

    well i dont got a vista cd how can i fix it mine is a computer that had origanilly xp but then i put vista on it so idk which one is on it right now ..

  13. 13 Cyber Valdez said at 6:44 AM on August 29th, 2009:

    @rolf a bootdisk is a USB or a CD/DVD but for our purpose, you need to boot from a vista CD/DVD so we are booting from cd. If you can, try borrowing a vista installer just so you can get to the boot menu and try the options i’ve posted above. That should save you a lot of trouble from reinstalling everything again.

    Hope that helps!

  14. 14 Julie said at 12:12 AM on August 31st, 2009:

    BIG QUESTION: B4 I try fixes… I have Windows Vista Business with XP Professional Downgrade. My laptop is less than 2 weeks old… Stupidly I checked the Compress C: Drive box. Dell says only way to fix is to replace the hard drive. Anyone know if this is true? Since I have 2 Operating Systems I’m unclear on how to proceed. Vista seems to be the underlying OS that the computer actually runs on with XP Pro piggybacking. Any help would be SOOOOO appreciated! WTH does that compression box even exist if it’s going to completely mess up the computer?!?!?!?

  15. 15 Cyber Valdez said at 5:11 AM on August 31st, 2009:

    @julie You don’t need to replace your hard drive, in fact, even if the fixes above didn’t help out – a reformatting should completely fix it. Try the fixes above first, they should help.

  16. 16 Julie said at 9:06 AM on August 31st, 2009:

    Hmmm, reformatting may be the route I have to go. My brother had an idea that maybe I could partition the drive at the MS-DOS command prompt, get the new partition to work and then use that to fix the original messed up part of the drive. Sound feasible? I tried all of the fixes above, but since I can’t select an operating system, they don’t work. Aaargh. So frustrating. Especially on a new computer…. Thanks for the help Cyber Valdez!

  17. 17 Rolf said at 8:40 AM on September 3rd, 2009:

    this is what my buddy wrote me and it worked for me: {look below for my comment]

    13.@rolf a bootdisk is a USB or a CD/DVD but for our purpose, you need to boot from a vista CD/DVD so we are booting from cd. If you can, try borrowing a vista installer just so you can get to the boot menu and try the options i’ve posted above. That should save you a lot of trouble from reinstalling everything again.

    Hope that helps!

    my comment: 9.why does the “compress” option even exists if it inevitably results in the “BOOTMGR is compressed” failure that disables the computer totally? I feel duped by Microsoft into buying a product – VISTA – that is not fit for the intended use.

  18. 18 tiw said at 5:17 PM on September 4th, 2009:

    2 is work for me thanks a lot.

  19. 19 Julie said at 8:49 PM on September 4th, 2009:

    Update on my computer woes… I tried repairing my OS 3 or 4 different ways to no avail. So I did end up reformatting. Everything seems to be working as it should now. But it’s such a pain to find & re-install all of the programs I had on there. Not to mention all the documents & data. I am now a FIRM believer in external hard drive backups!!! Won’t catch me with my pants down again, so to speak!

    And I completely agree with Rolf on the issue of why Microsoft is allowing that C: drive compression box to remain. There should, at the very least, be a warning that checking that box may cause harm to your computer!

    Good luck to all the poor souls who find this page because they’ve just gotten the dreaded “BOOTMGR is compressed” message!!

  20. 20 Sohail said at 4:14 PM on September 13th, 2009:

    Thanx guys for the help…. God bless You…

  21. 21 armoniaxxx said at 3:22 PM on September 21st, 2009:

    la 2 es la ley… gracias hermano P&♥

  22. 22 kwno said at 6:35 PM on September 26th, 2009:

    Thank you very much for your help. I can fix with option 2.

  23. 23 alvin said at 3:44 PM on October 2nd, 2009:

    Thanks guys!!!!!!!

    Option #2 works!!!

  24. 24 jay said at 6:48 AM on October 6th, 2009:

    have tried Optn 1 above but my toshiba laptop would not even recognize my cd/dvd from the boot menu to start from there. it is taking me back to the sam ‘BOOTMGR Compressd” and refused to boot from the VISTA DVD. any help out there

  25. 25 Cyber Valdez said at 1:46 PM on October 7th, 2009:

    Hi jay, best you can do is try every other options. cheers!

  26. 26 Lockex said at 3:51 AM on October 11th, 2009:

    Hi! guys.. i need help with my windows 7 ultimate yesterday i accidentally compressed my drive C.. then this morning i started my pc and the “bootmgr is compressed” bla bla bla… i configured the bios to set dvd-rom to be the first ddrive then restarted the disc i inserted started to turn fast but still “boormgr is compressed is coming out” im totally stuck there pls.. help me… peace out _

  27. 27 Kira said at 6:30 AM on October 11th, 2009:

    i’ve set the boot priority cd-rom to 1st but when my pc loads the dvd and turns it i dont get press any key to boot cd… pls help me im totally stucked

  28. 28 Jamel said at 10:45 PM on October 24th, 2009:

    Hey, thanks for the help. I just popped in a winxp installation cd and choose to repair instead of reinstall and now my sys is working just fine. for the record, I tripped when I saw that message and couldn’t boot my sys.

    thanks again

  29. 29 Nicke said at 5:01 PM on October 30th, 2009:


    Thanks a lot for a quick and smooth solution, alt 2 worked as a charm!

  30. 30 Rolf said at 3:00 AM on November 2nd, 2009:

    would you believe , after we fixed the BOOTMGR IS COMPRESSED problem I now have another problem with VISTA:

    I get messages to up-date Windows and when I try to do that I get this message: The Windows Installer Service could no t be accessed. This can occur if the Windows Installer is not correctly installed. Contact your support personnel for asistance

    I am the only user of this none-networked computer. What is Microsoft trying to do to me?! Any suggestions?

    Thank you


  31. 31 Cyber Valdez said at 10:29 AM on November 2nd, 2009:

    Hey Rolf, try these links: (Download and install)

  32. 32 Peter said at 3:48 PM on November 3rd, 2009:

    it works on my windows7 ultimate on option 2 thanks a lot!!

  33. 33 Addy said at 8:32 AM on November 14th, 2009:

    Option #3 worked a treat for me. Thanks for great advice.

  34. 34 Richard said at 10:42 AM on December 10th, 2009:

    Eternal thanks. #2 option worked for me too.

  35. 35 Rang said at 2:16 AM on December 12th, 2009:

    I try option # 2. It works right away. Thank a lot for your advise. I think those advises will many people.

  36. 36 Amanda said at 9:29 PM on December 13th, 2009:

    It´s pretty weird because I got BOOTMGR is compressed without compressing anything. It just happend one morning. Pretty strange but as soon as I find my vista-CD i will try this optiones. Hope they will work. Ty ^^

  37. 37 Kimi said at 6:27 PM on December 16th, 2009:

    thanks! its working! ***** stars!

  38. 38 techy malaga said at 12:13 PM on December 18th, 2009:

    it did fix the first comands and blessed be for the time you had to take it and help others who are unknow of characther likeyou with a big heart… thanks so much

  39. 39 flash said at 11:01 AM on December 21st, 2009:

    option 1 worked for me…yippeeee..

  40. 40 Emanuel said at 4:23 AM on December 26th, 2009:

    i trying but using the restore point

  41. 41 Ultimate154 said at 3:35 PM on December 27th, 2009:

    @Emanuel I tried using the restore point on my windows 7 ultimate but it didn’t work for me then I tried option 2 and worked perfect. I recommend ilusing option 2 or 3 if the restore point way doesn’t work. Just thought Id let ya know since the problem occured with me cuz it kept telling me to restart the comp but when it rebooted it came back up with the menu. And thank you Cyber Valdez for the help on this matter it helped me alot with my computer!

  42. 42 Leprechaun said at 8:49 PM on January 12th, 2010:

    I owe the person who put the time into posting this awsome help link on (BOOTMGR COMPRESSION ERROR)a big great[THANK YOU]…

    I started with step #3… since it was the most suggested which did not work so well for me 4 some reason .. so then i jumped back up to suggestion #2 consittering i tried #1 before even looking on the internet .. And like a charm…it worked great for me…

    I must add that i run windows 7 but started on vista… wasnt sure if it would work cuz it is a cracked version of 7 and my install disc is burnt.. I couldnt even pull a system format for fresh install .. but luckly i made a repair disc for windows 7 .. that acts just like the vista disc discribed up above (thank God) cuz i couldnt get the original vista istaller disc to load ether… lol ..

    - so thx again mister info man - 
  43. 43 mike said at 8:21 AM on January 16th, 2010:

    I tried doing these options with the success that the error did not come up, but only to see a black screen with no harddrive activity. I guess I have to reformat!!!

  44. 44 UL jun said at 9:29 PM on January 16th, 2010:

    Hello, I have the same problem with everybody, got that message bootmgr is compressed and ctrl+alt+del to restart… In a black background. I tried it a million times to restart but still goes to the same message after it restarts… It’s frustrating, I wanna try any of your troubleshooting techniques but it goes back to the same message in black background, no where to go. Pls help, what will I do if I get the same message over ad over again.

  45. 45 UL jun said at 9:39 PM on January 16th, 2010:

    Do I need to buy an external device or hook it to something to do the prompts? Since after I do the ctrl+alt+del prompts the computer restart but with the same message again and again without going further, where do I type the prompts in booting it? Seems like most of the ways suggested requires to get into the system itself, wherein in my case it same message in a black background. I’m using my phone by the way to make this message.

  46. 46 Edward said at 7:05 AM on January 17th, 2010:

    Hi there, I have gotten this messageBOOTMGR IS COMPRESSED, I felt helpless and tried option #3, it worked fine. Now my notebook is working. Thank for your wonderful tips.

  47. 47 kelvin said at 10:17 PM on January 18th, 2010:

    it is successed in window 7 ultimate with #2 option

  48. 48 johny said at 11:44 PM on February 11th, 2010:

    thanks for the help,but i used bootrec and than i used the options to remake a new boot and is working now, i use windows 7,

  49. 49 Mike said at 6:43 AM on February 16th, 2010:

    I tried #3 a number of times but it never appeared to actually execute. (I am running Win 7 Ultimate on a Gateway netbook). Finally, I gave #2 a shot and it worked. Thanks for posting all of these together and stating that they may not all work on a given machine.

  50. 50 Dennis said at 12:31 AM on February 20th, 2010:

    it works here! option 3!!!!! thanks a lot!!!!!

  51. 51 tolajib said at 5:22 PM on February 23rd, 2010:

    option 3 worked alright, thanks guys!

  52. 52 DeadDingo said at 6:18 AM on February 25th, 2010:

    Than you so much for your help, i have Windows 7 ultimate running on my system, and option 2 worked for me. Once again thank you. People like you are definitely a credit to us.

  53. 53 david said at 4:41 PM on February 26th, 2010:

    option 3 is is teh simplest

  54. 54 luis said at 6:30 AM on March 14th, 2010:

    since the mini hp doesn’t have a cd room the you just go to hp site and look for HP MIE Restore Image Creator utility will need another computer to do this….download the file for windows or linux or the op sistem you have and install it in the second computer and make sure you have a USB flash drive or an SD card with no less that 2 GB and empty!!! your flash drive or SD card it will be formatted automaticly once you have installed this plug it in to your mini hp and change the boot order(f9 to the SD card or flash drive ) and follow the instructions…it will bring your computer like knew so all the data you had in the mini it will be erased but since this computers have a really small memory….not really much of a diference you need your computer don’t you…follow the instructions..and good luck! here is the link :

  55. 55 Nick said at 9:42 AM on March 15th, 2010:

    I did option #4 and now my computer says that the bootmgr is missing. I would love to know how to fix my new problem with another command prompt that actually works.

  56. 56 NKanks a said at 11:55 AM on March 15th, 2010:

    OMG thank you sooo much.. #3 Worked for me… Nothing like it crapping out at 10Pm on a Sunday night.. and it being your work pc.. Thanks a TON!!

  57. 57 kdw0328 said at 1:14 PM on March 16th, 2010:

    I do not have a boot disc. I cannot get to boot up. How can I get a clean install?

  58. 58 kdw0328 said at 1:28 PM on March 16th, 2010:

    no. non worked for me

  59. 59 yasin said at 11:01 PM on March 18th, 2010:

    hm.. still a problem, too, bootmgr is compressed, I signed ctrl + alt + del, to restart. but the restart’ve still looks the same message. I try to enter W7 dvd, but no command to boot from dvd W7. whether it must wait a long time to boot from dvd W7? if booting dvd W7 can not, what should I do? plis reply..!!

  60. 60 yasin said at 11:03 PM on March 18th, 2010:

    hm,… still a problem, too, bootmgr is compressed, I signed ctrl + alt + del, to restart. but the restart’ve still looks the same message. I try to enter W7 dvd, but no command to boot from dvd W7. whether it must wait a long time to boot from dvd W7? if booting dvd W7 can not, what should I do? please reply this thanx for your time..

  61. 61 Cyber Valdez said at 10:07 AM on March 19th, 2010:

    You need to have your startup options in BIOS set to the the CDROM DRIVE 1st. I hope this helps :)

  62. 62 rape borax said at 3:00 PM on March 23rd, 2010:

    that really works.. thanks a lot

  63. 63 Christian said at 1:23 AM on March 28th, 2010:

    And if we don’t have our DVD? If our computer came without a DVD? What then? Hm?

  64. 64 hatorihanzo said at 2:57 AM on March 28th, 2010:

    I dont have the installation dvd for windows 7, can i use an installation dvd for xp?? if not what are my other opitions

  65. 65 Net newbie said at 5:57 PM on March 30th, 2010:

    Hi everyone, really need your help. I have an advent netbook which has the error “BOOTMGR is compressed”. I used a recovery disk but doesn’t work and because it’s a netbook it only has usb ports. I don’t have a version of windows xp to hand. Can anyone help?

  66. 66 Net newbie said at 6:12 PM on March 30th, 2010:

    Hi everyone. really need your help here. I have an advent netbook and get the bootmgr is compressed error. because it’s a netbook it only has usb ports, i’ve tried my recovery disk but it doesn’t work, and I don’t have a copy of windows xp. Can anyone help?

  67. 67 Dibyajyoti said at 10:46 PM on April 5th, 2010:

    okay now i’m seriouslr f****.. its because this problem is simple enough to solve but the problem is my computer stopped recognising DVD’s alltogether so i’m not able to boot up with the DVD… i’ve heard we can boot up with please help me out with it..i really need help !

    PS : i own a Dell Studio 15 Laptop

  68. 68 Hazem said at 2:14 AM on April 10th, 2010:

    I have a HP compaq 110 mini netbook, I had that problem,then I did what u said in reply ( ), which was so helpful by the way.

    but the restored system wasn’t XP as the old one, no , it is Nautilus , which is not that much fun , hard to use, using no applications, no codecs, no programs installation, no games, no excutable files.

    How can I restore my XP system? or even downloading another one ?

    I have a windows 7 purshased DVD, how can I use it here, yet my RAM is 1 giga. is it suitable for windows 7 ?

    thx man , U R A SAVIOR.

  69. 69 Carl said at 1:55 PM on May 13th, 2010:

    thx a lot… option 2 work for my windows 7… :D:D:D:D:D:D:D:D:D:D:D:D:D:D

  70. 70 rican1168 said at 7:23 AM on May 21st, 2010:


  71. 71 nour said at 7:16 PM on June 12th, 2010:

    really thanks alot…

  72. 72 greg said at 2:29 AM on June 14th, 2010:

    thanks very much bro!!!! the Option #2 is working!!!!!!!! :) :) :) :)

  73. 73 Daniel said at 3:02 AM on June 17th, 2010:

    Thank you so much this helped me avoid having to pay for a repair from PC shop’s or have to keep waiting on a very unreliable freind. The PC shops quoted me £40 as the lowest and £110 the highest! And that was just to do a full system installation and backup! Thanks so much for sharing this information as it managed to save me money and my data thank you Cyber Valdez.

  74. 74 nicco said at 1:36 AM on June 19th, 2010:


  75. 75 Pajoo said at 1:51 AM on June 30th, 2010:

    Yes thank you! option 2 helped me out! It’s fast and it works! again thank you for your help!

    ~ Cao

  76. 76 Dw1981 said at 11:16 PM on July 9th, 2010:

    I totally need help!! I have this stupid BOOTMGR is compressed message after I upgraded to Windows 7 Ultimate, how do I fix it? I DON’T have a boot disk and I only have this pc (my laptop). I can’t activate safe mode either. I have no other pc to download anything from. PLEASE HELP!!

  77. 77 dw1981 said at 5:11 PM on July 16th, 2010:

    Got my laptop fixed!! Had a friend hook me up with an installation disk. Option 2 worked wonders!!

  78. 78 Ben said at 2:17 AM on July 21st, 2010:

    Option #2 saved my life! Thank you!

  79. 79 Mark said at 3:43 PM on August 5th, 2010:

    Thanks a lot, worked at once, used option 2

  80. 80 Chekman said at 9:16 PM on September 22nd, 2010:

    I get the messange. got install disc, disc not reading. Cant get into cmd.

  81. 81 Shubham said at 9:51 AM on October 2nd, 2010:

    Thanks a lot man. you just saved me from 2 hours of frustration over my laptop Thanks

  82. 82 Sukumar said at 1:57 PM on October 3rd, 2010:

    Thanks really man….i was mad at this problem

  83. 83 Simon said at 7:55 AM on October 6th, 2010:

    Thank you! You realy saved my as there :) thanks

  84. 84 chetan said at 11:26 PM on October 6th, 2010:

    hi, i formatted older windows-7 ultimate,formatted that drive and installed fresh copy in it.but now got msg “BOOTMGR is compressed” it doesnt allow to install in other partitions also, i have tried all above options, but still getting same message, please help out….(mine is acer extensa 4630z)

  85. 85 Peetra Mainewil said at 8:14 PM on March 21st, 2012:

    A client had this problem, because C was compressed, I booted up Windows 7 with Hirens BootCD version 15.x and uncompressed C, problem solved, mbr is normal again. Easiest support thingy this month! 😀

  86. 86 bhavishya prajapati said at 2:47 PM on April 20th, 2012:

    bootmgr is compressed press ctrl+alt+del to restart and my dvd drive was saying f : application not found what should i do plz.. help me

  87. 87 ehsan said at 2:32 PM on July 20th, 2012:

    hello .how can fix my( bootmgr is compress )without windows changing?

  88. 88 GBong said at 2:58 PM on March 4th, 2013:

    I have a different error prompt. It says, “Olu is compressed”, Press ctrl+alt+del to restart

    But I will try the options above. I actually compressed the 80Mb of my 3rd drive which is drive G: which i dont know how it was created when I installed the windows on my laptop. FYI, I installed the w7 OS in the drive C.

    Hope this info can help in solving my problem. Thanks in advance.

  89. 89 Sly said at 8:09 AM on October 24th, 2013:

    Find Windows 7 Install DVD ( preferably cracked version if you lost the product key) and boot from CD/DVD Rom. Go to Repair Your Computer> Load Drivers. Right-click the C/: drive in the explorer window. Go to properties. Unselect “Compress this drive”. This fixed the issue for me in less than five minutes.

  90. 90 Murray said at 7:58 AM on October 30th, 2013:

    Option 4 finally worked for me. A client had chosen to compress the drive on their laptop. First time I had seen this problem. Hadn’t heard of anyone compressing a drive for years! (since the days when drive space was small and expensive) Thanks for the tip!

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