welcome thread stuck to the top of the forum.
Or you can use the forum search function and find similiar questions as yours. There are a few thousand threads.
I've had fairly good luck to date with Norton AV (touch wood), but more than likely there's something better out there which is the thrust behind this post. I need an AV, anti-spyware, firewall in one like the Norton. What do you gurus recommend for an OS of WinXP SP2? Thanks!