I tested a lot of free products AND a lot of paid products... For my work I had to install different antimalware products paid or not on different versions of Windows for my clients. These products are all useless IF the user have bad habits. It is not the antimalware product that make the difference : it is the users. There are users that click on everything and browse everywhere on the Net... this is where you have to work and an antimalware do not make the difference. There are users that never get any malware BUT they have antimalware software that slow down there machine.... it's a pitty ! Educate the users ! That is the key !