Ok, I have a Late 2013 iMac and a legal full copy of Windows 7. Now I know that I can't do an install of Windows 7 with this machine in bootcamp as there are no default USB3 drivers in Win7 and I have no keyboard/mouse available to finish the install (fought this battle a year ago so unless you're brilliant and know how to get around it I'm screwed on that point). That said, I have a legal copy of Windows 7, thus I should qualify for Windows 10, which WILL have support for an install on my iMac. But how the hell do I claim the upgrade? I don't have windows updater to install it or claim it? Any help would be appreciated. Thanks!