So a friends computer got infected with the fake system restore scam/malware while they were using eset av version 4.3(something). I had recommended eset av for them, but now they are doubting its effectiveness. Shouldn't eset have detected and prevented this fake program? Their whole computer was "hijacked", they couldn't run anything except the fake program, it blocked eset from running. Does the av not cover stuff like this, would smart security have prevented it? Or would an upgrade to v5 have blocked it?