I try KIS and now i'm using KAV7. I test KIS for leak test and it almost fail with "basic" leak testing so I shift to KAV7 only without the firewall, but i'm concern that KAV7 is also not 100% in protectiong Vista operating sytem. so my question is if NOD32 also waiting for Vista SP1 so that it will perform 100% virus protection for Vista operating system. Also how many MB NOD32 using in RAM (Average)? I might shift from KAV to NOD32. below is quote from don of Kaspersky. "It's as ready as Microsoft allows it to be, it's simply not possible to implement all the PDM options right now because MS does now allow it................it may change with Vista SP1."