I downloaded the latest version of AdBlock Plus for Chrome from Chrme Store last week, and began to have popups from "KingIlya" appear at every search. I contacted Symantec, and only after the technician took control of my Mac and deleted AdBlock Plus/Chrome did the popups stop.
Not believing that AdBlock could possibly be carrying such annoying malware, I re-installed it and re-started Chrome. Sure enough, at my very first search (Levi's jeans) the annoying little KingIlya window rose from the lower right corner of my screen...again.
I've relied on AdBlockPlus for years. Is this the firstname.lastname@example.org