I am currently trying out ESET Smart Security 18.104.22.168 after having used Kaspersky Internet Security for many years. Overall, I am impressed with the GUI, features and security of this product. However, I am curious why ESS is using so much RAM compared to KIS? ESS, as listed in Task Manager, is using over 100 megs (ekrn.exe=106,500; egui.exe=7,100) vs KIS only used c. 37,000 total. Currently only Outlook 2007 and IE9 w/2 tabs are running. I have no other AV programs running. KIS has been totally removed. MBAM is set to check for updates only, i.e., real-time protection is disabled. System specs: Vista Ultimate 32-bit AMD Athlon 64 X2 6000+ Mushkin SP PC2-6400 4GB 4X1GB DDR2-800 Asus M2N-E MB WDC WD5001AALS-00L3B (500 GB) I've already read a couple threads which addressed this issue but found the answers to be less than satisfactory. I am currently running the Trial version, but I have also purchased ESS and waiting on delivery.