Norton expired, after posting in this forum, I asked and the general consensus was it's a piece of junk. Many recommended Avast. I downloaded avast. Today I got flat and realized I hadn't restarted my computer in quite a while. Closed everything out and when it restarted it just locked up, no curser, wouldn't even go to sleep when I closed the lid on my laptop. No real way to power down a laptop, so I took it to the computer shop. He ran his check and said I had 133 known viruses. I told him about Norton, he agreed with the posters on this board, but also said avast is about worthless. He installed malware and spybot.