Yesterday I ordered a refurbished late 2013 13" MBPr 2.6/8/512 and I have some questions on installing Windows 8.1 Pro using the bootcamp method. 1. Where can I download the 64 bit full version of Windows 8.1 Pro iso? and can I download it to the OS X desktop? 2. Can I use a 8GB USB flash drive for the installation instead of buying the Apple external USB DVD drive? 3. What is the recommended partition size for Windows 8.1 Pro? 4. How does Windows 8.1 Pro handle the Retina displays? 5. Are the bootcamp drivers optimized for Windows 8.1 such as the trackpad functions?