Musi waNovember 18, 2008, Microsoft yakazivisa hurongwa hwekusununguka kwevatengi kuchengetedza chigadzirwa, codenamed Morro. Izvi zvakaratidza shanduko muMicrosoft yevatengi AV yekushambadzira zano: pachinzvimbo chekupa kunyoreswa-kwakavakirwa chengetedzo chigadzirwa nemhando yezvimwe zvishandiso, senge backup uye wega firewall, Morro yaizopa yemahara AV chengetedzo ine yakaderera mhedzisiro pane system zviwanikwa. Amy Barzdukas, mukuru director wezvigadzirwa manejimendi ye Services uye Windows Chikamu paMicrosoft Online, akazivisa kuti Morro haizokwikwidza zvakananga nemamwe mabhizimusi AV software; asi yakanangana ne50 kusvika 60 muzana yevashandisi vePC vasina kana vasingabhadhare kuchengetedzwa kweAV. Pakazosvika 17 Chikumi 2009, zita repamutemo raMorro rakaburitswa: Microsoft Security Essentials. Musi waJune 23, 2009, Microsoft yakaburitsa beta yeruzhinji kune vashandisi ve75,000 muUnited States, China, Israel neBrazil.
chigadzirwa chekuchengetedzwa kwevatengi