Hi John, welcome to Radio Geek.
MY first suggestion would be to stop using Internet Explorer and install
Firefox instead. It's more secure, more adaptable and it's great to support competition. Now to answer your question.

The browser you installed is Internet Explorer but has been branded by Telstra. All this means is that it displays some custom text for the tile bar. I did a quick search around the place and came across
this software that can remove the branding for you. I tested the software on a virtual machine and it worked for me. If you don't want to install software to do it you can find instructions on another way to do it
here.
One word of advice - be sure to update your web browser ASAP as the version that is on your CD from Bigpond is sure to be out of date!