Hi Kathy,
I'm out exploring.
lilhelper,
Firefox is open source (read free and developed by volunteers) and has become Internet Explorer's main competition recently.They released version 2 one week after IE7 was released.
It is more secure than anything Microsoft have ever put out,it updates itself if you want it to,has a lot of add-on's that you can pick and choose,and most importantly you can uninstall it if you want to unlike Internet Explorer.
They also do a fine email client called Thunderbird (yes I do) which knocks spots off Outlook and Outlook Express.
Have a look see and try it.You'll see where Microsoft got the tabbed browsing idea from too.
You can find it here
http://www.mozilla.com/en-US/firefox/