So I downloaded latest, and 'upgraded' a pathetic HP netbook running 'Win7 Starter' as an experiment, Four+ hours later, I had a working Win10 system. To my disappointment (as a Microsoft hater) it 'just worked', and 'windows.old' (20gb) was still there if I wanted to revert. Worse, once I'd undone via 'custom' (in too-small print) all the snooping, with a local account, it respected all my preexisting XP-lookalike settings and desktop and even seems to have preserved Classic Shell. 'Full OED' permissions did prompt an auto-download and CD-resetting. Is it remotely possible that Microsoft might be getting the majority of things right now, if one actually knows how to be cautious?