I have recently been having problems with the Antivirus in my N.I.S. 2011. For some reason it keeps switching itself off and the only solution is to remove and re-install Norton. I have had to do this manoeuvre at least 4 times in the past month but today was the final straw. I removed and re-installed, restarted my conputer and 2 minutes later I received the warning that Antivirus was switched off. I have downloaded all the updates and followed the on screen instructions and even the Norton Auto Fix cannot correct this problem. Each time I carry out this procedure it takes about 1 hour and it is now becoming annoying. Can anyone offer a solution to me.