I have Norton and have had for some time - recently my computer was hacked on facebook, it really was an awful time - then I discovered that Norton had an 'issue/hole' eventually things settled down (although I did take action to defend the hack) - I was thinking next time it comes to renew I will change but now just not too sure what will happen by renewal time. Mind you this was the only time I had problems.

I use Dr Web Cureit, it's free, but you can use it one time, then you need to download new version of the program. It's quite effective.