which search engine do you prefer??

I was using internt explorer and it was not in a position to bear the onslaught of many spywares. I switched over the mozilla firefox and for a year or so, I was comfortable. Due to creeping in of some viruses, the internet explorer hacked the mozilla and mozilla hacked internet explorer. I had tough time throwing both out. Now I have installed OPERA and I am quite happy and and have a peaceful working.