Well, we need more info. When you say you killed processes and then ask us how to make them stop permanently, we need to know what the processes are. In addition several people have inquired as to what program you ran and from what security site. The answer to that question is needed if, indeed, that is what caused the problem (which it sounds like, as you have stated that's when the problem started).

What are the processes you killed?
What security site did you go to?
What program did you install and run?