scareware
n.— «This Innovagest2000 domain has for at least four years now been associated with spyware and so-called “scareware,” surreptitiously installed software that bombards the victim with incessant and misleading warnings that their PC is infested with malicious software.» —“Following the Money: Rogue Anti-virus Software” by Brian Krebs Washington Post: Security Fix July 31, 2009. (source: Double-Tongued Dictionary)
Further reading
When a teenager went a week without talking as part of a school project, he noticed a surprising side effect: Instead of rehearsing a response to what other people were saying to him, he was focused on listening — and feeling smarter as a result...
Sure, there’s winter, spring, summer, and fall. But the seasons in between have even more poetic names. In Alaska, greenup describes a sudden, dramatic burst of green after a long, dark winter. And there are many, many terms for a cold snap...