Level 2

227 points

0xc0000001 at boot - Windows 10

I was under the mistaken impression that the system image backup and restore function that comes with Windows would be a good way to backup my partition. Turns out it doesn't play all that nice with at least some dual boot situations. Anyway, I got the restore to go, and straightened up the inconstancies with the partition tables. I have Windows 10 installed.

When I tried to start Windows, it went into an automatic repair loop. I found out how to disable that via bcdedit, but now I get a Blue Screen with a 0xc0000001 at boot.

chkdsk /r c: found some problems, but otherwise didn't help. Tried bootrec, that did nothing. sfc /scannow says something about a pending repair and refuses to run.

I'm not really sure where to proceed from here. The last thing I want to do is reinstall from scratch, since that defeats my purpose of making the system image. First thing I want to do is get sfc /scannow to run, then maybe I can look at replacing corrupted system files, or whatever might be the problem. I saw something about an offline scan for sfc, would that be what I'm looking for?

MacBook Pro (Retina, Mid 2012), OS X El Capitan (10.11.1)

Posted on Nov 3, 2015 3:48 PM

51 replies

Sam Wilkins Author

Level 2

227 points

Nov 4, 2015 12:54 PM in response to Loner T

I may be misunderstanding something, but I just did what you said, and selected Windows under Startup Disk and clicked Restart with the USB connected. It definitely booted from the internal drive and ignored the USB.

So I restarted again, holding down the option key this time.

I choose the selected volume, then click through the language selection and repair your computer stuff and get this.

Troubleshoot is the only choice that makes sense, so I click that and get this.

You didn't mention anything about resetting, so I click Advanced options.

I don't know which one of these you want me to click. I go ahead and click Startup Repair anyway.

I click Advanced options, then click my way through to a Command Prompt. I open that SrtTrail.txt file in Notepad. It shows a bunch of successful tests, then at the end it says "The operating system version is incompatible with Startup Repair".

Yeah, I'm facing a window. Sorry if this post is too image heavy, I just wanted it to be absolutely clear what I'm seeing.

I forgot to mention, I made this USB with a Windows 10 ISO from Microsoft. I assumed that's what I was supposed to do, and not boot from a disk containing Windows 8.

Loner T

Level 9

59,536 points

Nov 4, 2015 1:17 PM in response to Sam Wilkins

You want to select Command Prompt and then try to repair your BCD. Building the USB from W10 is correct method. Go back to the Pervious build will rollback your W10 to W8.1 (the version that you upgraded from).

You can build a W8.1 USB try the W8.1 USB for Startup Repair. IT is surprising that the Repair says you are using an 'incompatible' version.

Sam Wilkins Author

Level 2

227 points

Nov 4, 2015 4:15 PM in response to Loner T

I ran bootrec /RepairBcd. I get:

Successfully scanned Windows installations.

Total identified Windows installations: 0

The operation completed successfully.

Loner T

Level 9

59,536 points

Nov 4, 2015 4:24 PM in response to Sam Wilkins

What does /scanOS return?

Sam Wilkins Author

Level 2

227 points

Nov 4, 2015 4:36 PM in response to Loner T

I get the exact same thing.

Loner T

Level 9

59,536 points

Nov 4, 2015 4:46 PM in response to Sam Wilkins

This is probably the silliest question. Can you check your drive letter? Is it X: or C:?

Sam Wilkins Author

Level 2

227 points

Nov 4, 2015 5:24 PM in response to Loner T

Good thing I took a picture with my iPhone before going back to OS X. It's X: I thought it ran on the BCD in C: regardless.

Loner T

Level 9

59,536 points

Nov 4, 2015 5:43 PM in response to Sam Wilkins

Can you please try it on C:?

Sam Wilkins Author

Level 2

227 points

Nov 4, 2015 5:55 PM in response to Loner T

I'm not sure if you this is what you meant, but I booted off the USB, and did "cd /d C:/" then "bootrec /ScanOS". I still get "Total identified Windows installations: 0".

Loner T

Level 9

59,536 points

Nov 4, 2015 6:02 PM in response to Sam Wilkins

To rebuild BCD using Bootrec.exe, you may need to enable read-write. Please see https://technet.microsoft.com/en-us/library/cc766465(v=ws.10).aspx . Repair should do it automatically. Please verify.

Sam Wilkins Author

Level 2

227 points

Nov 4, 2015 6:05 PM in response to Loner T

You want me to make sure the readonly attribute isn't set for my main Windows partition?

Sam Wilkins Author

Level 2

227 points

Nov 4, 2015 6:31 PM in response to Loner T

It says readonly: no for both the disk and the C: volume.

Loner T

Level 9

59,536 points

Nov 4, 2015 6:51 PM in response to Sam Wilkins

On C: can you run dir/s/p bcd ? This was the reason why I asked about the Microsoft tree on EFI. Please see Can't resize Macintosh HD partition for an example on a Mac.

On my late 2013 15 rMBP, windows 8.1 is installed using EFI, but it has a separate System Reserved partition, which contains the BCD. On the linked article, S: was the Mac's EFI partition. Since you have an MBR, your BCD should be in C:\boot.

Sam Wilkins Author

Level 2

227 points

Nov 4, 2015 7:26 PM in response to Loner T

I got 5 files called BCD on C:. Including one under C:\boot. I had to add /a to include hidden files to find them all. I'm guessing there's some command you want me to run to determine the active BCD.

I had a Microsoft tree on EFI, as I had converted to UEFI boot using this guide https://www.reddit.com/r/mac/comments/3dlu2g/convert_a_bootcamp_bios_windows_ins tallation_to/ but as my Mac doesn't seem to be UEFI compliant, it killed my sound, and caused video issues, I'm guessing due to the fact it now saw the Intel HD Graphics 4000. But that got blown away when I completely destroyed my partition table and had to format the entire drive, when I was trying to restore my system back to legacy boot.

Loner T

Level 9

59,536 points

Nov 4, 2015 7:28 PM in response to Sam Wilkins

The file in C:\boot should be the one that needs to be rebuilt. Please see https://support.microsoft.com/en-us/kb/927392 and see the /rebuildBCD section.

(This is here, just in case you need it - https://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ attrib.mspx?mfr=true ).

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0xc0000001 at boot - Windows 10