I have Windows 8.1 installed through Boot Camp currently on my Mac. Within Win8.1, I am prompted to upgrade to Win10, which I would like to do, but only after this upgrade process is 100% supported with bugs having been resolved. Are there any reports of problems initiating an upgrade from Win8.1 to Win10 from within the Win8.1 partition, and then having it supported by Boot Camp? -------------------------------------------------- Info for context, no need to read: The reason I'm so anal about making sure this is a validated, effective, problem-free path to updating, is because it was an incredibly arduous ordeal to get my Mac configured as it is with dual data drives and boot camp. It's a 2011 17" MacBook Pro. I had already replaced the internal Superdrive with the included HDD and then put an SSD in the primary data drive slot when I decided I wanted to install Windows on the HDD (which was my secondary drive). It turns out that on this model of Mac (as well as some others that came with Superdrives), there is a nonsense requirement to install Windows from a DVD inside an internal Superdrive. Even though Macs of the same generation that came without superdrives can install Boot Camp from external superdrives, and even though newer macs support installing Windows from USBs. I tried everything including using an external superdrive, using an external generic DVD drive, and using USBs, but true to Apple's documentation the only thing that would work is installing from an internally-installed superdrive. So I had to revert my entire hardware setup, moving the HDD back into the primary drive slot, putting the superdrive back in, re-installing Mac OS on the HDD so that I could run Boot Camp utilities, just to get Windows installed on that drive, so that I could put all the hardware back in my preferred places. Needless to say I'd rather stick with Win8.1 until I die than do this again, so I don't want to upgrade to Win10 unless its known to work 100% of the time.