Thank you for the advice.
My system is an IBM T43 laptop with 1.86GHz, 1 GB Ram, and has XP Pro SP3.
A few years old, however it worked at a very reasonable speed with the setup from my previous post.
Which firewall do you use?
If I chose Online Armor, does it play nice with Avast Pro, MBAM, Firefox 3.5.2 and XP Pro SP3?
Thank you for your advice.
Avastfan1