Internet Explorer is the most widely used browser on the planet. It is not as
secure as it could be and is often used as an entry point to gain access to
your PC.
There are other browsers available that are not big targets for malware. Firefox from Mozilla and Opera are two free browsers you can use as browers instead of, or along with Internet Explorer.
You can have more than one browser on your PC. You can have only one browser active at a time while the others sit on the Taskbar along with any other minimized programs you have. Remember that a browser is just a program that you launch when you need it!