That outweigh the slight slowdown that is. If you remember the screen name, I'm the pre v3 NOD32 fan that has been hoping for an ESS that's a keeper for me. Using a temporary pc right now with XPx64 and ESS 18.104.22.168 is running well. I've seen a couple posts that it's working fine with Win7 x64. When I get the good new ssd Win7 is going back on. With only a small slowdown in E-mail access and page load times I might keep this turned on.