The o/s I use is Windows XP.
As to what I've done for years, just what a computer is for: Microsoft Word, e-mails, browsing the web, AIM, Power Point, etc.
My household only has one computer so two other people use this computer, but seldomly so.
In regards to a firewall, I'm not sure if I have it installed but if I do, how do I uninstall it?
Also, thank you for your advice about firefox; I will try it.