Windows partition gone after Yosemite installation

Hello,

My Windows partition has gone after installing Yosemite. I'm not sure if the Windows was installed with BootCamp because my wife has installed it 6 years ago and she says "I think I installed it with BootCamp." but not sure.

I have the same issue with this discussion: https://discussions.apple.com/thread/6603591?start=30&tstart=0

I couldn't understand from that discussion much.

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I am using MacBook Pro (15-inch, Mid 2009)

Model Name: MacBook Pro

Model Identifier: MacBookPro5,3

Processor Name: Intel Core 2 Duo

Processor Speed: 2,8 GHz

My Disk Utility info is like this:

Verifying volume “disk0s4”Verifying file system.** /dev/rdisk0s4

Invalid BS_jmpBoot in boot block: d5b1ac

File system check exit code is 8.Error: This disk needs to be repaired. Click Repair Disk.

Verify and Repair volume “disk0s4”Repairing file system.** /dev/rdisk0s4

Invalid BS_jmpBoot in boot block: d5b1ac

File system check exit code is 8.Updating boot support partitions for the volume as required.Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.

diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 455.8 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 43.4 GB disk0s4

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.5 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Microsoft Basic Data Dirty30 1.5 TB disk1s2

diskutil cs list

No CoreStorage logical volume groups found

sudo gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

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 976773167

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 890284216 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

890693856 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

891963392 84809728 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

976773120 15

976773135 32 Sec GPT table

976773167 1 Sec GPT header

sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 60801/255/63 [976773168 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 - 890284216] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 890693856 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 891963392 - 84809728] Win95 FAT32L

Help me please. 😟

Thank you.