Instruct: Classify a review as either positive or negative.
Query: Terrible Antivirus Software. DO NOT BUY IT!

Norton Antivirus 2007 is a terrible software. I tried to install it under Win XP. It is extremely unstable. There are so many "unexpected error, please bala bala ....". Everytime there is an red-x error sign on the icon, I can't figure out if it is working or not. If there is a time to consider buying NAV 2007, DON'T CHOOSE NAV!