Missing NTFS partition after YOSEMITE update

[totom]

Hi,

After a MACOS update to 10.10.3, I lost my Windows partition.
I've two HD one my machine, one for MACOS, the other one for Windows
I ran TestDisk and I can see the correct partition but it is not bootable.

Should I keep using testdisk or switch to GDISK to change the value ?
I'm real noob in IT and I need advice..

Useless to say that it is my office machine and the work is staking
disk0 is clearly the windows part

Select a media (use Arrow keys, then press Enter):
>Disk /dev/disk0 - 256 GB / 238 GiB
 Disk /dev/disk1 - 320 GB / 298 GiB (RO)
 Disk /dev/rdisk0 - 256 GB / 238 GiB
 Disk /dev/rdisk1 - 320 GB / 298 GiB (RO)

Disk /dev/disk0 - 256 GB / 238 GiB - 500118192 sectors
     Partition               Start        End    Size in sectors
 P EFI System                    40     409639     409600 [EFI]
>P MS Data                   411648  500117503  499705856

here what i found with GDISK

sudo gpt -r -vv show disk0
Password:
gpt show: disk0: mediasize=256060514304; sectorsize=512; blocks=500118192
gpt show: disk0: Suspicious MBR at sector 0
gpt show: disk0: Pri GPT at sector 1
gpt show: disk0: Sec GPT at sector 500118191
      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       2008         
     411648  499705856      2  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
  500117504        655         
  500118159         32         Sec GPT table
  500118191          1         Sec GPT header
MACPRO-TOM:~ thomasdelcourt$ sudo gpt -r -vv show disk0
Password:
gpt show: disk0: mediasize=256060514304; sectorsize=512; blocks=500118192
gpt show: disk0: Suspicious MBR at sector 0
gpt show: disk0: Pri GPT at sector 1
gpt show: disk0: Sec GPT at sector 500118191
      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       2008         
     411648  499705856      2  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
  500117504        655         
  500118159         32         Sec GPT table
  500118191          1         Sec GPT header

please, I need a next step....

thanks