Window 98 2nd. Ed. it is ("factory installed").

I am finding differences in browsers. Normally I use Netscape, but I have to go to IE for certain websites- otherwise I get "illegal operation," or an error message, either at the beginning, or somewhere inside when I click on certain links (example- Fanny Crosby in Cyberhymnal).
Some of the fancy html used by posters is only readable in IE.