I have 64-bit Win7, on which I use Windows Firewall and Microsoft Security Essentials. I use both FF 13 and IE , both 64-bit versions. Generally speaking, I keep the settings leaning more to high security. As additional protection with the browsers, I run them in Sandboxie, which I especially like because it is quite unintrusive. Under these circumstances, and I do not mean this facetiously in the least, what benefit can I gain by using S&D? I am trying to measure the payoff. Thanks.