Somehow verarscht

For many years now I use NIS (of course with the appropriate updates). Until the day came when my laptop has developed a mind of its own. Suddenly went to the window, which I definitely do not open (mostly "naked women"). Until I found "Malwarebytes". Suddenly I get around 300 infected files displayed, the NIS has not found. So somehow I feel taken by Norton on his arm. And in strict I am no longer prepared to pay for this "service" yet.