There are a number of internet browser applications you can use to access the internet.
The list of most popular browsers include:
Microsoft Explorer - http://www.microsoft.com/windows/internet-explorer/?WT.srch=1
Mozilla Firefox - http://www.mozilas.com
Apple Safari - http://www.apple.com/safari/

If you would like to use something other than those browsers listed above,
here are a few others to consider:
Opera - http://www.opera.com/support/tutorials/security
Mozilla SeaMonkey - http://www.mozilla.org/projects/seamonkey
Konqueror - http://www.konqueror.org
Netscape - http://browser.netscape.com

Whatever browser you decide to use it is crucial the proper security settings are in place to protect yourself and your computer for harm. 

Please see the links below for information on how to secure your internet browser.