KIS 2012 is definitely lighter than previous versions and has been running pretty good for me - any system sluggishness I may have experienced initially was no longer an issue after I deselected Perform Idle Scan. The only tell-tale signs of KIS being hard at work are the Application Control check of changed executables taking a few seconds longer than I would have liked.
gbpackerfan said:
Hm.. Emsisoft? I hear it has VERY good protection, but performance?
EAM used to be heavy on resources, but both real-time and scan speed performances have been drastically optimized in v6.0. I think it is in Norton, avast and a few other lightweight products category, at least that's my experience with it. To me, it is one of the most improved products of 2011, shame about their relative obscurity.
Another good point about EAM is its compatibility - you can run it alongside other security solutions [set the File Guard as an anti-executable and add the relevant real-time exclusions to minimize impact]. The other consideration would be the need for a good firewall/HIPS with EAM, unlike KIS [and its very good Application Control].