On your Mac download the free program AppleJack and follow the instructions to install it.
Then boot into Single-User Mode and run the 'Auto pilot' mode to run all the fixing routines. After it goes through and tries to fix the drive just type the word "reboot" (without the quotation marks) and you Mac will boot into regular OS X mode.
Last see if you can then use Boot Camp again.
Mac Pro Dual 2.8 Quad (2nd gen), 14G Ram, Two DVD-RW Drives, OS X 10.8.3
2006 Mac Book Pro 2.16 (first Gen) OS X 10.7.4
2TB Time Capsule, 2 TB
32G iPhone 4S Black, iPad (3rd Gen) 32G Black