I tried DefenseWall - loved the concept, wasn't too keen on the system impact (amongst other niggles). Bought NIS 2011 for 3 PCs but changed my mind shortly after and have received a refund. Any suggestions to complete my line-up? (Current software in sig.) I'm leaning towards a behaviour blocker or HIPS instead of a traditional AV. Free or lifetime license preferred but am willing to pay yearly for the right program. P.S. With AppLocker I feel almost bullet-proof so my final app is for peace of mind I think.