Newegg offers downloads of ThreatTrack Security Vipre Internet Security 2015 1-User Lifetime for Windows, model no. VIS1LT2015ESD-0000US, for $19.99. That's $3 below our December mention and the lowest price we've seen. (It's a current low by $49.)
Also available are downloads of Kaspersky Anti-Virus 2015 1-User 1-Year for Windows, model no. KAV1501111USNO, for $7.99. That's the lowest price we could find by $16, although we saw it for $8 less (with rebate hassles) in January.