Sites like thesaurus.com suggest "friendly", "sociable", and "warm" as antonyms, but those are the middle of the spectrum. I'm looking for a single word that goes beyond that, to describe someone that is overly "friendly", who takes liberties, who is unaware or slightly uninterested in other people's boundaries. Not in a clearly perverted or malevolent way. "Handsy" would be too strong and specific of a word (because it implies physical contact). "Oozing" would also be wrong - there may be little to no liquid. But you're having something like "ooze" foisted on you (any substance or practice that you don't want near you).
I search for this word every once in a while, with no success. This week I had to set up a Windows 10 computer. After opting out of Microsoft's invasive default settings, here I am again, trying to find a word that describes similar people (and companies). Sample sentence: "I try to avoid Windows 10, because it's the _____est software they've ever released (Clippy included)."