Boot Camp disappeared after installing El Capitan

Hi, I have a lot of important files on my windows 8.1 Boot Camp partition and they were not backed up recently. I upgraded from Yosemite to el capitan OS X 10.10 this afternoon and the screen froze on reboot and then booted into windows with an error. After I rebooted it back into OS X it continued with the install however the Boot Camp partition is not visible from the disk utility although you can see it and select it upon pressing on the Option key during startup. If the windows partition is selected a recovery error is shown for windows, even with the usb key inserted.


Macbook Pro mid-2014 1TB SSD Approximately 700G OS X and 300G Windows 8.1


Here are my results from the terminal prompt tests mentioned in earlier threads.


User uploaded file


User uploaded file

User uploaded file

User uploaded file

Any help is appreciated, working on figuring out how to run test disk from the command prompt. New to macs.

Thanks!

Posted on Oct 19, 2015 8:55 PM

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72 replies

Oct 21, 2015 5:52 AM in response to Loner T

No, unfortunately all I see is the install windows screen. What I am wondering is if my win 8.1 images are just the installation disk and doesn't include the windows re portion. Or if you have to press a key at a specific time to get to that screen you are showing. I have tried the esc key during the win 8.1 usb load up and IIRC it shuts the MBP off.


Maybe it's possible to download a windows re version that would work on windows 8.1 and repair the BCD file? Would need to make it USB bootable.

Oct 21, 2015 11:43 AM in response to Loner T

Not that I am aware of. Fairly basic Win 8.1 install. Also turned off FileVault on the OS X but that only made the EFI partition visible during power on boot with option button pressed. I tested it and it loads into OS X.


I am also trying another method to retrieve the files from Win 8.1 without any luck.


I downloaded a program with windows recovery on it called AOEMI PE Builder for windows 8.1. This loads Windows RE into memory has system repair functions along with windows explorer to find files and retrieve them. http://www.aomeitech.com/pe-builder.html


I created a bootable USB with AOEMI PE on it and booted into it by turning on, pressing the option button and selecting the windows USB. It loads windows and gives the windows startup screen but then gives an error code: 0x000000d


If I select EFI Boot instead of Windows it just hangs with a black screen.


So I am running out of things to try. If there was a way to access the BCD file and correct the damage from OS X upgrade, or load windows into memory.

Oct 21, 2015 11:57 AM in response to Loner T

I also tried a different method of getting Windows PE latest version for Win 8.1 (which is Windows Recovery) to start and it worked. It started up with a command prompt for Drive X.


However I do not know how to rebuild the BCD from drive X.


Here is a Tutorial Video on how to make the USB disk with Windows PE and load it up through UEFI boot. I am at the command prompt screen with X:\windows\system32>


https://www.youtube.com/watch?v=UJWGeK7_XDE


Maybe this is the method to focus on?

Oct 21, 2015 2:31 PM in response to Loner T

when running dir/s/p bootrec.exe on X: it returns

Volume in drive X is Boot

volume serial number is D60A-0DC2

File not found


When changing directory to C: it changes then auto changes back to X: before you can type anything into the command line


some of the .exe files available in System32 are bcdedit, bcdboot, bootcfg, chkdsk, diskpart, esentutl, find, recover

Oct 21, 2015 3:10 PM in response to Loner T

Ok, I went to the Microsoft site and created a new usb copy of windows 8.1


http://windows.microsoft.com/en-us/windows-8/create-reset-refresh-media


I then powered on with option pressed and selected the usb copy of windows. it loaded and gave me the screen with the repair option for the first time. This screen never appeared on the other 2 copies of the windows 8.1 usb drive. Not sure what the difference is between the MS site and my OEM DVD but using the link above gives the correct screen.


I went to command prompt and typed in:

Bootrec /FixMbr

It said it completed successfully. I removed the usb and rebooted pressing option. After selecting the actual bootcamp windows directory it gives me an error saying "Remove disks or other media. Press any key to restart. I have no usb or other media attached and after pressing any key it just hangs there.


Any ideas on what to do next?

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Boot Camp disappeared after installing El Capitan

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