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Level 1

4 points

0x0000034 BCD Error Bootcamp, No Startup Repair

Hi! I have a late 2013 15" Macbook Pro which has been dual booted with OS X 10.11.3 and Windows 10.

After a particularly large set of Windows updates, upon restart I get an error stating that there are missing boot files (error 0x0000034). I have followed other threads and created a Windows 10 install media on an SD card, and am attempting to run Startup Repair to fix the BCD error.

However, when booting from the SD EFI icon in bootcamp, I get a message stating that it looks like I have begun an upgrade to Windows, would I like to continue the upgrade by removing the installation media, or instead perform a clean installation of Windows 10. If I remove the media, I get returned to the original blue error screen. If I attempt a clean install, I go through a few windows asking for language, input etc and then arrive at a window which asks where I want to install Windows 10.

There are 5 possible partitions available in the dialog window, and a variety of options including "Refresh" and "Format", but there is no option to run Startup Repair.

There is another icon/option that appears in bootcamp which is simply labeled "Windows". Attempting to boot from that icon gives the same results as booting from the EFI icon, but at a much lower screen resolution (everything is bigger and more jagged).

TL;DR: How do I run Startup Repair off of a bootable SD card, when Windows believes I was in the middle of an upgrade when the BCD files were lost?

Thanks in advance for the help!

Tech Specs:
Late 2013 15" Macbook Pro

OS X 10.11.3, Windows 10

2.3 GHz i7

16 GB 1600 MHz DDR3

NVIDIA GeForce GT 750M 2048 MB

500 GB Flash storage (334 GB on OS X, 164.6 GB on bootcamp partition)

MacBook Pro with Retina display, OS X El Capitan (10.11.3)

Posted on Apr 13, 2016 10:12 PM

80 replies

Loner T

Level 9

59,471 points

Apr 16, 2016 2:47 PM in response to DietDrPhil

Attempt Three is building a new BCD from scratch. You can try it.

DietDrPhil Author

Level 1

4 points

Apr 16, 2016 11:00 PM in response to Loner T

If you're still with me, I feel like I'm so close. I got W10 to boot successfully once, but after 30 seconds it crashed and wouldn't boot. Finding the log file from Startup Repair displayed this:

Looks like it can't find the os loader.

Startup Repair diagnosis and repair log

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Number of repair attempts: 1

Session details

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System Disk = \Device\Harddisk0

Windows directory = C:\WINDOWS

AutoChk Run = 0

Number of root causes = 2

Test Performed:

---------------------------

Name: Check for updates