When I installed bootCamp to load Windows 7 (on a separate drive in my Mac Pro) I had to reformat the BootCamp drive to NTFS before Windows 7 would install (a Retail disk).
Mac Pro Dual 2.8 Quad (2nd gen), 14G Ram, Two DVD-RW Drives, OS X 10.9.1
2006 Mac Book Pro 2.16 (first Gen) OS X 10.7.5
2TB Time Capsule, 2 TB
Black, iPad (3rd Gen) 32G Black