I was always happy with nod32 and XP. upgraded to smart security with vista about 18 months ago and have had sluggish browsing, etc. Not sure if smart security was to blame though. However, I do see more complaints about ESS than I did with NOD32. Have just done a clean install of win7 and accidentally installed NOD32 instead of ESS and am wondering if I should proabably just leave it in conjunction with windows firewall. Any views? Thanks R.