three very simple questions,
1)how big is your HDD?
2)how much free space do you have?
3)how big are you trying to make bootcamp?
most people dont know but formatting a bootcamp partition wastes a ton of space on my computer it took about 14.5GB (windows 7x64... i don't know if the os makes a difference though) My friend tried for a week to install and she finally came to me, she had like 80 gigs free and tried to make a 75gig partition, never worked. i said 65 gigs, and it worked flawlessly. As a side note that 15 gigs got take from my os-x partition. Mine is 200 GB, and windows gets all 200GB, but my mac only gets 285GB instead of the 300GB left on the hdd.
Check the size 🙂