Everyone knows I use Norton AntiVirus (2007 at the moment).
I have learned to live with its idiosyncrasies. The antivirus function is excellent.
There is one other idiosyncrasy that perhaps should be mentioned. A default setting in NAV (2006 and 2007 anyway) disables Windows System Restore. Here is how to fix it.
http://www.5starsupport.com/faq/xp-s...store.htm#1-21
I just leave the "How to protect my product" box unchecked permanently. The "protection" is only for NAV, itself.