I am joining the rest of you re 'parasites' in the computer!

Have spent the last 48hours searching out a safe (free) site (is there such a thing?) with which to destroy them. I have installed and uninstalled SO many, my head is reeling!
So now I shall try Spyware/ S&D/Aluria, in fact all the ones mentioned above.
I discovered that all my cute smilies are in fact Spyware! *sobbing uncontrollably*
bfn.