I'm a stand-in right now on a computer repair job for the normal tech. The person I am working for's regular techie convinced her to use both NIS and Avast at the same time. Working on this sytem is like trying to wade through knee-high mud in the middle of winter. This customer is willing to trade speed for a sense of security. First, is there some merit to what the techie has said? I am not a Norton user, but I was under the impression that NIS included antivirus components. I think the overlap between the two programs isn't making her any more safe than either would on its own. Part of why I'm working on these systems is to install more RAM, as the customer has been complaining of slowdowns since going to the two-pronged defense setup. Secondly, if having both NIS and Avast at the same time is not the best of ideas, how do I go about convincing the customer that her time and money are better spent going with one or the other? This is absolutely NOT an "Is A or B better?" question. I simply believe the customer would enjoy a more fluid experience by making a choice to pick one and stick with it.