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Q: Bootcamp Blue Screen winload.efi

For some reason my Windows 8.1 installation has been BSODing on startup, and I'm not sure what caused it.


The error is initially

0xc0000001

And then

0xc000000f "winload.efi missing" once I press enter.

 

Some output:

 

diskutil list:

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *251.0 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:          Apple_CoreStorage Macintosh HD            217.4 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.1 MB   disk0s3

   4:       Microsoft Basic Data                         32.8 GB    disk0s4

/dev/disk1 (internal, virtual):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                  Apple_HFS Macintosh HD           +217.0 GB   disk1

                                 Logical Volume on disk0s2

                                 7055B8CA-1226-4AA8-946E-6CD9A464E79B

                                 Unlocked Encrypted


sudo gpt -r show /dev/disk0

      start       size  index  contents

          0          1         PMBR

          1          1         Pri GPT header

          2         32         Pri GPT table

         34          6        

         40     409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

     409640  424516304      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

  424925944    1269760      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

  426195704       1288        

  426196992   64036864      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

  490233856        863        

  490234719         32         Sec GPT table

  490234751          1         Sec GPT header


sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 30515/255/63 [490234752 sectors]

Signature: 0xAA55

         Starting       Ending

#: id  cyl  hd sec -  cyl  hd sec [     start -       size]

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

1: EE 1023 254  63 - 1023 254  63 [         1 -  490234751] <Unknown ID>

2: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

3: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

4: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

 

I'm really not sure what's going on and any help is much appreciated.

MacBook Pro (Retina, 15-inch, Mid 2014)

Posted on Jan 24, 2016 8:45 PM

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