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bootcamp partition renamed untitled after booting in MacOS

Can anybody please help me ?

I had succesfully installed Windows 10 on my Macbook Pro and ran Windows already several weeks smoothly.

Unfortunately I did not make a backup of my windows files yet.

Today when I booted to El Capitan to connect my iPad to iTunes Windows gave me a message that it needed repair when I tried to reboot to the bootcamp Windows version.

It did not succeed in repairing and only gave my an advanced options menu.

I booted back into MacOS to find that the windows partition was renamed to 'Untitled' and that no files were visible in Finder.

I than ran Disk Utility and selected First Aid on this partition, I thought this was read only to check for disk errors.

Now when booting from Windows it says no operation system available and Disk Utility shows 496 GB empty space on this partition !

I hope not all my files are lost !!

What can I do to repair the bootcamp partition ? I tried to install setup bootcamp files on USB but cannot boot from USB (does not show the USB drive)

thank you !

Olivier

MacBook Pro, OS X El Capitan (10.11.3), Bootcamp Windows 10

Posted on Apr 5, 2016 11:34 AM

297 replies

ozeegers Author

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Apr 16, 2016 1:20 PM in response to Loner T

no BDC file to be seen 😐

Loner T

Level 9

59,536 points

Apr 16, 2016 1:28 PM in response to ozeegers

Go back to C: and run

dir/s/p BCD

No spaces between "dir" and "/s" and "/p". 😉

ozeegers Author

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Apr 16, 2016 10:38 PM in response to Loner T

Loner T

Level 9

59,536 points

Apr 17, 2016 8:18 AM in response to ozeegers

Try the /rebuildBCD on C: and test. The 16,384 byte bcd files are default ones and do not contain any significant information.

ozeegers Author

Level 1

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Apr 17, 2016 11:24 AM in response to Loner T

okay, I booted into windows 10 !!

BUT... it seems to be an old configuration and not the windows I had when I booted into OS X ?

When I open outlook it does not contain my archive pst files neither the plugins (todoist etc) I installed...

Do you have any idea how this can happen ?

thanx, Olivier

ozeegers Author

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Apr 17, 2016 11:31 AM in response to ozeegers

it seems to be my windows configuration when I upgraded windows 7 to windows 10 ?

Loner T

Level 9

59,536 points

Apr 17, 2016 1:47 PM in response to ozeegers

Can you add the second installation to the BCD and check it? If you are within 30 days of the W7-to-W10 upgrade, you get an option to rollback. Are you looking at that installation?

ozeegers Author

Level 1

5 points

Apr 17, 2016 10:40 PM in response to Loner T

No, I installed the W10 in january. I had different files on my desktop, different files in my document folder. And most importantly I had created all archive folders for my IMAP mails which I don't find anymore with this installation.

But when I look in the Windows.old dir there's no such files.

So I don't understand what is happening ?

Maybe I should just accept that I lost my emails, delete the windows partition and stick to OS X because it is unstable on this 2011 machine ? I got used to the Mac OS anyway....

Or do I have to try and issue the bootrec /buildBCD from command within windows and choose N en Y when he askes for the boot options ?

Do I have a chance of getting these emails back ?

thank you

ozeegers Author

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Apr 17, 2016 11:53 PM in response to ozeegers

also very strange i have 15,3 Gb free of 185 Gb.... my other windows should be hidden somewhere I think...

Loner T

Level 9

59,536 points

Apr 18, 2016 6:47 AM in response to ozeegers

1. Was Windows resized before or after the W7-to-W10 upgrade?

2. Were the Emails archived prior to the upgrade or after?

3. Using Testdisk showed this as the only viable header. Your 440+ GB was reduced to 185+ GB. There is a difference of about 250GB on your current disk.

4. Please do not modify/re-partition in any way, otherwise we will lose the window to recover data.

ozeegers Author

Level 1

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Apr 18, 2016 9:12 AM in response to Loner T

I installed Bootcamp with my windows 7 CD's and license already a few years ago. Then I did a backup of my files on the OS drive and upgraded W7 to W10 without a flaw. So I've been using win10 since december 2015 I think.

It is already a couple of months ago so I don't recall exactly.

ozeegers Author

Level 1

5 points

Apr 18, 2016 10:39 AM in response to ozeegers

Do I have to try and issue the bootrec /buildBCD from command within windows and choose N en Y when he askes for the boot options ?

ozeegers Author

Level 1

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Apr 19, 2016 1:36 PM in response to ozeegers

Hi Loner T,

Hope you're still there ! 😉 almost there ! 😎

Loner T

Level 9

59,536 points

Apr 19, 2016 2:54 PM in response to ozeegers

Bootrec.exe is accessed from Windows RE (Recovery Environment). You will need a W10 installer to be able to /rebuildBCD. Make sure you correctly assign drive letters in diskpart.

ozeegers Author

Level 1

5 points

Apr 20, 2016 1:55 AM in response to Loner T

Hey Loner T,

I booted again from DVD to go into recovery mode and saw this screen:

Use another operating system !

I get these two: windows 10 and windows 10 pro

The windows version that works but is the old one I talked about is the Windows 10 Pro and when I start the Windows 10 version I get this screen:

I did not run the bootrec yet since your last message, does this change things ?

thank you

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bootcamp partition renamed untitled after booting in MacOS