If you haven't already heard, the US Computer Emergency Readiness Team and its British counterpart are telling people to stop using Internet Explorer (IE), until Microsoft can fix a security hole that allows attackers to install malware on your computer without your permission. For more details, click here.
What other browser options do you have? Webteam suggests Google's Chrome Browser, or the Mozilla Firefox Web Browser. They can be downloaded here: Chrome, and here: Firefox. These are both great browsers, and perhaps after testing them out, you will even learn you prefer them over Internet Explorer.