I've used NOD32 for two years. V4 introduced an integrated SysInspector, and after running it and examining the results I was surprised to find some out-of-date display drivers being called by rundll. It also identified an old Intuit service that should have been removed two years ago. Thanks to sysinspector I could go through and clean out the registry and old .dlls to help ensure a more stable system. Thanks Eset!