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.