Ever since I upgraded my Norton antivirus scan in August, my laptop has been feeling unwell. Its condition deteriorated in the last few days. I tried everything that I could think of (including emailing Symantec Online Technical Support) and nothing worked. In the end, I had to send my laptop away for repairs. I was told they had to replace the hard disk! The technician said that Norton antivirus program takes up 40% of any computer's processing capacity. I am annoyed that Symantec does not warn potential buyers about that. I am peeved as I have to live without my laptop for a week. I am definitely looking at other virus scan when I get my laptop back.