I’m going to install NIS2009 into personal computer with Vista home. First Norton product. Not very computer literate!! I currently use free AVG 8.0, Superantispyware and CCleaner. Do I remove those items? How about Windows Defender? Do I close all items? Will that not allow viruses to come in while I donwload NIS2009. Should I make a CD back-up first just in case. I want to use this product as it should be used but I am fearful I may mess up a pretty darngood running pc.