Hi there I wanted to make a Boot Camp-partition on my MacBook Pro (250 GB). The reason is, that the university I attend only use Windows-programs. I started The Boot Camp-assistent, and chose a 200/50GB partitioning. After a few minutes the partitioning resulted in an error, stating that the program couldn't move certain files. After a quick google-research I found that I had to backup and erase the disc (Macintosh HD) and make a new partition and re-install OS X on it. But having done that, I went to the Boot Camp-assistent again, only to realize that the disc size now is only 227 GB! My question is: How come has the disc size decreased and how do i get back to a 250 GB? I really hope, that someone can help me, cause I'm quite useless when it comes to computers.