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I'm usually running my Bootcamp partition in VMWare Fusion. When resuming from sleeping the computer told me it was restarted due to a problem. Now the Windows 10 partition doesn't boot, either in Bootcamp mode or in VMWare Fusion. The bluescreen error is 0xc0000225

I have run chkdsk c: /offlinescanandfix from a repair usb stick, but it didn't help. I have tried to set the Bootcamp partion active using Diskpart from the Windows repair usb stick, but it told me that the partition couldn't. Gpt? Don't remember.

I can access the Bootcamp partition from Finder in OSX.

My mac is a MacBook Pro Mid 2015 running Sierra 10.12.6

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In any case, there's one way I've found to resolve this. If you have access to another computer, take out the affected computer's primary drive and find a way to mount it in the system (internally, externally, whatever). Then do the following:

  1. Open command prompt as an administrator
  2. Type in diskpart
  3. Type in list disk. Find out which disk the affected drive is.
  4. Type in select disk #, where # is the affected drive's number
  5. Type in list partition, find the partition number of the system partition (it's usually 100MB, 200MB, or 300MB), then
  6. Type in select partition #, where # is the system partition's number.
  7. Type in assign letter=z, assuming you don't have a Z: drive.
  8. Exit out of diskpart by pressing Ctrl+C or typing exit
  9. Type in

    BCDBoot [Drive letter of affected drive's Windows partition]:\Windows /S Z: /F UEFI
    

    So if the affected drive's Windows partition is, say, G:\, you would type in

    BCDBoot G:\Windows /S Z: /F UEFI
    

It works for me.

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I tried all available fixes, but in the end I had to reinstall. I couldn't either do a repair installation. I had to do a clean install. Despite, it moved all my old files to windows.old and my own folders in c:\ was still there.

This is the second or third time this happens. I'm going to put all important stuff in onedrive and use reinstall as first option.

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