Hi guys, I am trying to install windows on My MacBook Air 2012. I reached the partitioning step, but I it told me that it is not possible because 'some files cannot be moved' and that I have to back up the disk and use disk utility to format it to 'extended(journaled)', but my HD is already in that format. I tried to fix it with DiskUtility, but nothing happened. I found some info that I have to use original disk to fix it, but Airs dont have original CDs. Please help me I would really appreciate it.