What exactly does this setting do? Reading in the forums it seems like this is supposed to be enabled, but when I installed it the default was it being off not on. When I try to turn it on stuff starts acting weird. Even though it isn't check the real-time scanning seems to be functioning, if I take a known detected sample and copy it onto my desktop or something it is detected immediately. I'm wondering what function this setting serves because everything seems to work fine without it and acts weird with it on.