After update to Yosemite, Windows won't start

Yes, the Yosemite update crippled my Bootcamp partition too. Unfortunately I stumled upon Bootcamp and Yosemite upgrade - potential data loss warning too late to read the warnings...

I’ve a Macbook Pro (early 2011) that runs Windows 7 most of the time. Four years without problems - the Macbook is the best Windows computer ever!

After I experienced some hard to trace Windows crashes in the past days, I thought it was a good idea to start the computer in OS X and check for updates. One of them was Yosemite and as the other updates went smooth, I thought Yosemite would be be a piece of cake too. An error message appeared while installing (something about MBR I think) and now I can only start in OS X, although the Windows partition is still there.

I have read some good tips from the uber-fixer Loner T in Bootcamp and Yosemite upgrade - potential data loss warning, so here is the output from the commands. I hope there is some advice for my disk too :-)

diskutil list:

—————————

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *512.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macbook 56.0 GB disk0s2

3: Microsoft Basic Data 455.8 GB disk0s3

diskutil cs list:

—————————————————

No CoreStorage logical volume groups found

sudo gpt -vv -r show /dev/disk0:

——————————————————————————————

gpt show: /dev/disk0: mediasize=512110190592; sectorsize=512; blocks=1000215216

gpt show: /dev/disk0: Suspicious MBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 1000215215

start size index contents

0 1 MBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

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

409640 109375000 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

109784640 262592

110047232 890167296 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1000214528 655

1000215183 32 Sec GPT table

1000215215 1 Sec GPT header

sudo fdisk /dev/disk0:

————————————————————

gpt show: /dev/disk0: mediasize=512110190592; sectorsize=512; blocks=1000215216

gpt show: /dev/disk0: Suspicious MBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 1000215215

start size index contents

0 1 MBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

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

409640 109375000 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

109784640 262592

110047232 890167296 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1000214528 655

1000215183 32 Sec GPT table

1000215215 1 Sec GPT header

MBPvanCristophe:~ Christophe$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 62260/255/63 [1000215216 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID>

2: AF 1023 254 63 - 1023 254 63 [ 409640 - 109375000] HFS+

3: 0C 1023 254 63 - 1023 254 63 [ 110047232 - 890167296] Win95 FAT32L

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