I suggest you use Partition Table Doctor to Fix boot sector.
First thing I recommend you download the demo version of
Partition Table Doctor.(
http://www.ptdd.com/download.htm )
Run the program and right click the partition and choose fixboot.
http://www.ptdd.com/fixboot.htm
If have any question,
1. Please describe the problem of your partition, the more particular
the more better.
2. Please backup partition table
(
http://www.ptdd.com/backpartition.htm) to file to create a backup
file.
3. Please select "Reports" from "General" menu to create a reports.
Send the two files to us(
(E-Mail Removed) ).
Our lab will analysis the files. At last, our lab will send a file
back to you and you just restore partition table for partition
recovery.