A browser is the program you use to access the web. Internet Explorer, Safari, Firefox, Opera, several others. They all do the same sort of thing but Internet Explorer (the most used, because it comes with any Windows computer) is the most likely to cause this sort of problem (and is the one you're likely to be using if you don't know what a browser is).

Do a google search for "Firefox download" and follow the instructions to get it working. Then use it instead of Internet Explorer.