Hey, So I'm having this problem that I can't install Windows 8 Pro x64 through bootcamp. I've created an installation USB on Sandisk Extreme 64gb USB3 and split the drive with bootcamp assistant. When ever I try to install windows, it says "We couldn't create a new partition or locate an existing one. For More information, see the Setup log files". Image of this has been attached. I just can't get past that point. Any idea what's going on? I'm installing this on my 15" Retina Macbook Pro. Help would be appreciated, been trying to fix this for way too long. Thanks in advance! SOLVED: Check post number 9 for details how this was fixed.