I like threatfire, but cpu spikes and holds at fifty percent on two machines. If something raises its dander, it could stay pegged high for all night. Specifically, I have a weather bat that pings to null and waits; it also wgets radars and wputs them after convert with image magic. Threat fire has a heart failure. I even added wput, wget, cmd.exe, ping to trusted applications. Mamutu works fine but I cannot hang with yearly or per computer subscriptions. They are out of freakin mind with pricing. Maybe forty bucks forever for three computers, or four buck a year for three computers. Never eighty for a year. Get real, the benifit is good, but I do Opendns out badguys, I do have av, I do sandbox, I do have hips, pegaurd2. And don't do cracks. I also use Opera or chrome. But if something gets past my hips, I let out, isn't in signature database, slips past my heuristics, Then, I would like Mamutu or Threatfire.