I don’t know why but from yesterday my Norton antivirus is not working any more. Every time I am trying to perform full system scan it display an error message unable to perform the task. For fixing the problem I had updated my Norton antivirus but still the problem is same. I had also tried by just reinstalling Norton antivirus but not got any type of success. So I want to ask this from you people, what more I need to do? I don’t want to buy a new antivirus.