Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I am trying to install Win 7 SP1 (using Windows Update), but it failed with 0x800F0A12. I have a dual boot configuration windows - linux, otherwise perfectly normal configuration.

This web page: http://windows.microsoft.com/en-US/windows7/windows-7-windows-server-2008-r2-service-pack-1-sp1-installation-error-0x800F0A12 suggest some fixes, but only the first one seems relevant. However I get:

C:\Users\ga>mountvol /E
Access is denied.

The main reason why I am so keen to have it installed is because Windows stopped recognizing my optical drive (it just completely vanished after one of the automatic updates). It might be related to this issue.

An ideas how to fix it?

EDIT: Following @vcsjones' advice I managed to run mountvol /E successfully, but it didn't help with the SP1 installation unfortunately.

share|improve this question
3  
In your command prompt, is it elevated? (It will say "Administrator" in the title bar). If not, run it elevated by typing "cmd" in the start menu search, and holding "ctrl+shift" whild clicking it. Then try your mountvol. –  vcsjones Feb 24 '11 at 18:25
    
@vcsjones: thanks, it did fix the access denied issue. Trying the update again... –  Grzenio Feb 25 '11 at 8:17
add comment

1 Answer

I solved the problem by going to disk manager and setting the windows C: disk as active. On my setup, that didn't cause any problems with GRUB and everything worked fine.

share|improve this answer
    
Didn't really help :( –  Grzenio Feb 25 '11 at 11:26
    
@Grzenio Can you post what your partitions looks like? There are lots of tips on the various blogs and forums about this, but I'm not sure which are applicable in your case. Do you have the small "windows system" partition? –  AndrejaKo Feb 25 '11 at 12:32
    
what exactly would you like to know? (ideally let me know which cmd line tool to run :) –  Grzenio Feb 25 '11 at 15:14
    
@Grzenio which are your active partitions and on which partitions is /boot and windows C:. –  AndrejaKo Feb 25 '11 at 15:38
    
@Grzenio or better post a screenshot of your partition map –  pratnala Nov 20 '12 at 13:31
add comment

protected by Community Jul 12 '13 at 17:11

Thank you for your interest in this question. Because it has attracted low-quality answers, posting an answer now requires 10 reputation on this site.

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged or ask your own question.