May 062008

You may experience the following error when installing Windows XP Service Pack 3 (SP3) when installing on Intel iMAC using Bootcamp to run Windows XP.

There is not enough disk space on C:\WINDOWS\$NtServicePackUninstall$ to install Service Pack 3 Setup requires an additional 4 megabytes of free space or if you also want to archive the files for uninstallation,Setup requires 4 additional megabytes of free space. Free additional space on your hard disk and then try again.

This happens because iMac uses EFI file format which Windows XP does not support. To workaround this problem, add a registry key as follows:

1. Click Start – Run – Type “regedit” and press enter.

2. Navigate to

3. In the right pane, Right-click and select New – String value

4. Name it as “BootDir” and set its value to “C:\”

This should help. Try installing SP3 and should work fine.

Incoming search terms:

  243 Responses to “Error “There is not enough disk space” when installing SP3”

  1. hey thnx a lot…..did everything but this finally worked !!!!

  2. I am in a foreign land when I’n dealing with Windows. Thanks for your help. I now have Service Pack 3 on my MacBook Pro. Thank you.

  3. MERCI beaucoup,
    Excellent travail.
    (MBP 17 Bootcamp)

  4. Worked as a charm! Thank you so very much for sharing this information! :D You made my day!

  5. This worked- thank you so much…

  6. Thanks! Worked awesomely!

  7. Yes, it works on an IMac. Only tried installing Windows XP 3 times before checking the Internet for a solution.

  8. Thanks for this :-)

  9. Awesome fix. Thanks

  10. Great fix!

  11. oauouououououou!!!! this post is extremely helpful to a mac-newbie!!! ????????? ????!!!!

  12. Once again, thank you for sharing this tip! It worked great on my MBP.

  13. This worked once i figured out right click meant to go to the menu bar to click on edit since i only use the mac pro touch pad.

    This needs to be added to the mac boot camp instructions.

  14. Dude, you are better than the Knuckleheads of microsoft.

  15. your tip is still out there helping people like me. thanks!!

  16. AWESOME!
    Worked for install, and it may be my imaginination but I think the whole machine is working smoother now.

  17. Thank you, worked!!!!!!!

  18. Thanks for the tips, it works here too. Where do you find this information (MS source for example) ?

  19. Thanks for this info. It worked

  20. Thanks for this!!! Finaly I instal SP3 on WinXP at MacBook/Boot Camp.

    Thanks many times…

  21. Brilliant!

    You da man!!

  22. you are a total legend, thanks!!!!!!!!!!!!!

  23. It work….Thanks…
    Brilliant !!!!

    You are the BEST…..

  24. thanks.

  25. Perfect :-)

  26. youre a genius, great, many thanks!! :)

  27. yessssssssssssssssssssss

  28. Wow! I was sure there was something wrong with my installation, but boy was this an unecpected workaround. Thanks a bunch!

  29. Fix this problem on my AMD HP laptop..Big time thanks!

  30. you are amazing.
    many thanks

  31. Great fix! Worked like on charm on my MacMini with Bootcamp. The ONLY Post I have found that worked! Thanks again.

  32. Thanks so much!

    Another MacBook installed SP 3 NO PROBLEM!


  33. Just wanted to add my own “thanks” to the very long list here.

    Couldn’t figure out for the life of me wth windows was complaining about – I had bootcamp set up a 32GB partition on my macbook, and most of it is still empty. Punched in “Windows XP SP3 out of space” into the mysterious google machine which pointed the way to your post.

    Installing SP3 now, thanks!

  34. You are Greatttttttttt Its working good !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  35. Works for me too!

  36. You are the MAN! This worked great and saved me from having to buy a PC or another copy of windows!

  37. Thank you! it worked on my iMac


  39. AWESOME! Thank you so much! This worked like a charm on my new MacBook.

  40. Hey Thanks! You just got me a client! But anyone knows what does this do?

    (Sorry for my bad english)

  41. This workaround is unnecessary, download the Bootcamp 2.1 update BEFORE you install SP3.

    Not doing this means you are risking instability.

  42. It helped. thanks a lot.

  43. I took this advice and applied it to my Windows PC and it worked. I have tried finding info to fix this problem all day. Why oh why didn’t I think of checking with a mac user first. With 3 other machines (all macs) here at the Inn, I’ll be glad for the day when I can dump this one problem child.

  44. It worked for me also.
    Just great,

  45. Confirmed working through Parallels 3.0-5608 running a boot camp installation of Windows XP SP2 on a Mac Pro!

  46. I get the same error message, but I am using an HP Pavilion mx 70 with XP SP2 installed. Any help would be appreciated.
    (I installed a new hard drive, 80 GB, so there is plenty of hard drive space available.)

  47. I love you

  48. YOU SAVED MY LIFE! THANK YOU SOOOOOO MUCH, if at all possibly if would take you out to a nice fancy dinner and a movie…but alas…it was not meant to be


  49. Thanks mate, worked a treat!

  50. Worked for me too, what a legend!

 Leave a Reply



You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>