Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks

Your Mac (and Macs prior to Late 2013 which run EFI v 1.1) are considered preUEFI and do not support Intel UEFI 2.0 specifications. On such Macs, Windows is installed using BIOS emulation and a MBR and GPT in sync, which is known as a Hybrid MBR. As Macs have gotten closer to the Late 2013, they have supported more and more of UEFI 2.0 specs. 2010 Macs may support 50%, but 2012 macs may support 80-90% of specs. Full 100% support started in Late 2013.

The UEFI specification supports GPT-only disks and W7/W8 also had partial support, but W10 is also now fully 2.0 compliant.

On your Mac, the hardware exposed to Windows is controlled by an emulation layer called CSM-BIOS.

My recommendation is to remove the current partition using Disk Utility, run BCA and let it partition (create the MBR) and allow a BIOS installation to complete. GPU and Audio are the most sensitive to such controlled exposure of hardware. EFI will not always see all hardware properly on such machines. You will need to create a physical DVD fro your Windows ISO.

1. Was the partitioning done by BC Assistant or Disk Utility?

2. Is your Optical drive not functional?

3. You may have a partial EFI-based installation, which may no work properly on your 2011 MBP?

On your Mac you do not want to convert to GPT, because of EFI-related issues. Please see How to install Windows using Boot Camp - Apple Support for BC Assistant based installation steps. This is another helpful link Use Windows 8.1 on your Mac with Boot Camp - Apple Support .

Last weekend, after searching high and low, I was able to do a clean install of Windows 10 on my Late 2013 Mac Pro (OS X 10.10.4). My primary issue was that in Boot Camp Assistant (v5.1.4), the option to "Install or remove Windows 7 or later version" was (and still is) greyed out. I, like LordVoss, had used Disk Utility to create a Windows partition formatted as FAT.

Boot Camp Assistant had successfully created the Windows install USB key, and I was able to boot into the Windows installer. It was when I tried to format the Windows partition to NTFS did I run into the MBR/GPT issue. I found and installed a OS X command line utility 'gdisk' which changed the hybrid MBR data to allow Windows to install properly. All details are noted here: http://superuser.com/questions/508026/windows-detects-gpt-disk-as-mbr-in-efi-boo t

After using 'gdisk' and rebooting back in the Windows install, the drive formatted without a hitch and I was up and running Windows 10 in no time. I would like to note, and I doubt this has any bearing on my successful install, but I did install rEFInd before I found and installed 'gdisk'. I mention this because I upgraded the bootcamp drivers in Windows last night – to the newly available Boot Camp 6 drivers – and I wasn't able to boot back into OS X. I did see some articles about rEFInd and slow boot times, and I suspect rEFInd as the culprit, but that's a completely different discussion on its own.

My main concern, Loner T, is what option do I have besides creating a partition manually in Disk Utility, if Boot Camp won't create the Windows partition for me?

On Macs with built-in Optical drives (with a few 2012 Macs as exceptions), a physical DVD must be readable and in the optical drive for that option to be enabled. You mention as 2013 Mac, as noted in my previous response, these models will support a direct installation using EFI boot and a Disk Utility-created Free Space partition. This Free Space will get split into an MSR and MS Data partition by the EFI installer.

Using Gdisk to create an MBR forces a legacy BIOS installation on such (and later) Macs. rEFInd is a Bootmanager/Bootloader and is really not necessary on a Mac which already has a built-in Apple Bootmanager. If you use multiple OSes, then rEFInd is very helpful.