So far I've had no major issues with my XP Pro I'm on now with the default firewall so I'll probably just use the windows firewall on it. For an AV, I'll go with Avast. I've been told SpywareBlaster is a "must have". I might add, this Dell (when it arrives) will be used to get a W7 tower "re" adjusted to my liking. (The original owner is legally blind & color blind"). Then I plan on using it for a jukebox so It'll only be online a limited time, hopefully. But thanks for your input jobeard.