Keeping systems malware-free is a never-ending challenge. In my recent TechRepublic post, I show how a new free tool can help you to protect your external Web servers. This week, much of the IT ecosystem is focused on San Francisco for the RSA Conference. I keep an eye on events like this for key product updates and new releases that can enhance the quality of my IT practice. The QualysGaurd product is a free service to scan your external web servers.