Bootcamp disappears after updating to mavericks

Question

Hello all, i'm experiencing a lot of problems after updating to OS X Mavericks 10.9.4 especially with bootcamp.
My bootcamp partition is greyed out in disk utility, access bootcamp,  i cant seem to mount it, delete the partition via bootcamp assistant. 
I guess something went wrong in bootcamp after updating . i've been looking up all over the net trying to see if there are possible solutions to fix this problem.
[REDACTED] sudo gpt -r -vv show /dev/rdisk0
gpt show: /dev/rdisk0: mediasize=500107862016; sectorsize=512; blocks=976773168
gpt show: /dev/rdisk0: Suspicious MBR at sector 0
gpt show: /dev/rdisk0: Pri GPT at sector 1
gpt show: /dev/rdisk0: 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  613765824      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  614175464    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
  615445000       1528        
  615446528  361326592      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
  976773120         15        
  976773135         32         Sec GPT table
  976773167          1         Sec GPT header
[REDACTED] 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 -  613765824] HFS+       
3: AB 1023 254  63 - 1023 254  63 [ 614175464 -    1269536] Darwin Boot
*4: 07 1023 254  63 - 1023 254  63 [ 615446528 -  361326592] HPFS/QNX/AUX
Help please !

Answer 1

Excellent work to get to this point. Were any of your partitions resized after Windows was already in place?
Your table (and my cheat sheet) looks as following
GPT 3 Start
GPT 3 Size
GPT 3 End
NTFS Start
Byte Offset
NTFS Size
NTFS End
322675264
1269536
323944800
323946496
1696
166287353
490233849
You need to use the following steps. If you see any error messages during the following steps, please stop and post back here with the error message.
Rebuild using start/end offsets from Testdisk DeepSearch using GPT Fdisk (http://sourceforge.net/projects/gptfdisk/)
Sudo gdisk /dev/rdisk0
P  (print the full list of parts)
D  (delete)
4  (part 4)
N  (new part)
4   (part 4)
323946496 - Start offset in bytes  (start point for Bootcamp part)
[phone] (Size offset as opposed to End offset)
0700     (Windows part type)
P           (print list of all parts just to see what changes will be made)
W         (Write the new GPT)
Y           (Yes! really write the new GPT)
   This will delete and re-write the GPT partition info for /dev/disk0s4.
Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR
Sudo gdisk /dev/disk0
P  (Print list of parts)
R   (Recover)
H (chooses Hybrid)
Partitions numbers to be hybridized: 2 3 4
Y (Good for GRUB question)
N (part 2 flag)
N (part 3 flag)
Y  (part 4 flag make bootable partition)
W  (Write the new MBR)
Y    (Yes! write the new MBR)
Reboot
Test 1 - Does Bootcamp Volume show up in Finder?
Test 2 - Can you see your files in Bootcamp Volume?
Test 3 - Can you select Bootcamp in System Preferences -> Startup Disk?
Test 4 - If Test 3 is successful, select Bootcamp and Click Restart.
If you see a hanging underline cursor at the top left on a black screen, and it does not proceed further, you may need Windows Startup Repair or a tool called EasyBCD.