Im losing my mind at the moment, for the past two days I've been trying to use bootcamp to partition my rmbp hard drive and create a bootable windows usb so I can access windows and use revit. Ive had so many problems and after finally thinking i had created a bootable windows usb and successfully partitioning my hard drive I was very annoyed to find that after the partition via bootcamp had finished and the reboot began a black screen appeared with 'non-system disk' written and 'press any key to reboot'. (I read that this was the system trying to open up the windows partition but it couldn't find it?) I rebooted again and held alt hoping that both the mac and windows startup disk would appear but only the mac one did. I entered the mac setup and checked finder to see that a hard drive named Bootcamp was in the device list, I'm confused because it shows as a hard drive but doesn't appear to be useable. So basically I'm lost, can anybody direct me to where I might be going wrong? Im pretty sure its nothing to do with the windows 7 iso because I used it to set up a virtual machine with parallels. I've never installed bootcamp so I'm pretty clueless.