Lost Bootcamp after Yosemite Upgrade

Hi Loner T,

As many people, I've lost contact with bootcamp installation on my mac and now I'm not able to access Windows 7 at startup. I've seen many threat with people you were helping out and tried to apply those action to recover from that situation without success. I don't understand the full process and it scares me more to mess up more an already bad situation.

I've run the 4 commands you were asking to other and I got those results

1)

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 645.2 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 80.0 GB disk0s4

2)

No CoreStorage logical volume groups found

3)

gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168

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 1953525167

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 1260182248 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

1260591888 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1261861424 535414224

1797275648 156248064 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1953523712 1423

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

4)

Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 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 - 1260182248] HFS+

3: AB 1023 254 63 - 1023 254 63 [1260591888 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [1797275648 - 156248064] Win95 FAT32L