Hi ScooterDork,

AVG Free Edition contains resident, online and on-demand scanners.Windows do feature firewall (simple for Windows XP, better one featured in Windows Vista/7).

If you require a standalone firewall, you could consider purchasing AVG Internet Security or combining AVG Free Edition with a 3rd party firewall of your preference. If installing a 3rd party firewall, please make sure there are no resident anti-virus components active which may be conflicting with AVG.

Maybe others will share their preferred software and experience in this discussion.

Hope this helps.