Hands down ESET Internet Security. Even with all the tweaks enabled I still don't even feel it's there. Protection wise it's top notch also although its the end user who's ultimately responsible for any infection. I use ESET on my gaming rig and can say that it's the most gaming friendly AV.Is there a Gaming friendly AV?
That's an issue with a lot of antiviruses. It you want something that is light all the time try ESET, Panda or 360 Total Security.What opinions are there about kaspersky free? sometimes I see that it consumes a lot of CPU all of a sudden... but in general I see it light.
WD in AV-Comparative indicates that it is very heavyWindows Defender, ESET, Bitdefender Free, and Kaspersky Free.
You shouldn't take too much notice of test results. Antivirus performance often varies greatly from one computer to the next. An antivirus which I find to be too heavy, may work well for someone else. You really need to install antiviruses and try them yourself to see how they perform on your own system.It's a bit frustrating to find different results on each site...