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

DietDrPhil Author

Level 1

4 points

Apr 15, 2016 2:35 PM in response to Loner T

No luck. Ran fixMBR, fix Boot, ScanOs and RebuildBcd. No errors, and rebuild and scan both said no identified Windows installations.

Currently I am running these on a command prompt I started through Troubleshooting (after booting into my hard drive Bootcamp partition). Bootable media is inserted but icon was not selected on startup.

Loner T

Level 9

59,536 points

Apr 15, 2016 2:43 PM in response to DietDrPhil

1. Are you able to see your Windows files in OSX Finder?

2. You may want to consider EasyBCD, which will give you a UI to work with - http://neosmart.net/EasyBCD/ . Be careful with this tool, though. It can cause OSX Issues, if you allow it to change partitions, etc. .

DietDrPhil Author

Level 1

4 points

Apr 15, 2016 2:47 PM in response to Loner T

Yes, I can see my Windows files on OS X. The weird thing, is I used to get an output of 1 Windows installation found (this was right around the first time I was able to get Windows to boot a few hours ago).

Could you explain a little more what it is looking for when it scans?

DietDrPhil Author

Level 1

4 points

Apr 15, 2016 2:54 PM in response to Loner T

bcdedit returns this (I renamed EFI disk to Q:):

Any clues? Do you think I should rebuild the BCD on the C: disk, as well as Q:?

Loner T

Level 9

59,536 points

Apr 15, 2016 2:53 PM in response to DietDrPhil

Did Windows boot fully the first time? If it did, the pending updates/failed updates are causing the issue, not your BCD.

The BCD normally has an entry for your boot OS. /scanOS looks for potential boot entries by looking for MBRs or Boot partitions. This is why I was asking if C: and the BCD stores were assigned drive letters.

Check out EasyBCD.

DietDrPhil Author

Level 1

4 points

Apr 15, 2016 2:57 PM in response to Loner T

It booted into Troubleshooting, in which I selected "Exit and continue to Windows 10". Desktop appeared and everything looked fine, with a dialog stating "Not all updates were installed. Click here for more info."

Troubleshooting also includes an option to revert to previous version of Windows. Would that be worth a try (to avoid updates)?

I'll look at EasyBCD. Anything else?

Loner T

Level 9

59,536 points

Apr 15, 2016 2:56 PM in response to DietDrPhil

The Q: drive letter is incorrect. It should point to the EFI hard disk path.

Loner T

Level 9

59,536 points

Apr 15, 2016 2:57 PM in response to DietDrPhil

DietDrPhil wrote:

It booted into Troubleshooting, in which I selected "Exit and continue to Windows 10". Desktop appeared and everything looked fine, with a dialog stating "Not all updates were installed. Click here for more info."

Did you allow the updates to be installed/completed?

Loner T

Level 9

59,536 points

Apr 15, 2016 3:00 PM in response to DietDrPhil

The 449MB looks suspicious. Can you use the W10 diskpart?

DietDrPhil Author

Level 1

4 points

Apr 15, 2016 3:02 PM in response to Loner T

1. No, I did not allow updates to reinstall (as far as I know; there were no graphical messages stating updates were installing).

2. Here is output of diskpart:

Loner T

Level 9

59,536 points

Apr 15, 2016 3:08 PM in response to DietDrPhil

Ah, this is where the Q: came from. Usually this is a \\Harddisk\Partition4 syntax, because Q: can change. Let me check. Will get back to you in an hour or so.

DietDrPhil Author

Level 1

4 points

Apr 15, 2016 3:10 PM in response to Loner T

Appreciate it. I am investigating a Microsoft support thread that has a similar issue.

Loner T

Level 9

59,536 points

Apr 15, 2016 4:09 PM in response to DietDrPhil

I have W8.1 using a regular BIOS/MBR installation which has the following BCD.

DietDrPhil Author

Level 1

4 points

Apr 15, 2016 4:13 PM in response to Loner T

It seems like the system should be booting from Bootcamp (C), not from EFI (Q), right?

Should I rebuild the boot files on C instead of Q?

Loner T

Level 9

59,536 points

Apr 15, 2016 5:03 PM in response to DietDrPhil

This is the EasyBCD output from a 2013 rMBP with W8.1 in EFI Mode. Notice the device for the Boo Manager.

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0x0000034 BCD Error Bootcamp, No Startup Repair