Eight Essential Layers of Security for Every PC

Our Sue Marquette Poremba got quite a bit of feedback on her blog post about layered security to protect PCs -- so much so that we decided to package up her list of eight must-have preventative measures into this quick slideshow. Her advice ranges from using the latest version of your favorite browser to ensuring that your network has monitoring tools in place that send up red flags when they see unusual behaviors.
As Roger Thompson, chief security officer with AVG Technologies told Sue:

The single most important thing to understand is that 99 percent of all attacks now originate from the Web. When you start a Web browser, it starts from a trusted place, inside the firewall, so that creates a trusted tunnel thru the firewall, and if a victim visits a Web site of hostile intent, the attack code is able to go right through the firewall, and has a chance of executing on the PC.

Also be sure to check out some of the great reader comments, including the post from Heunemann. who notes:

The bad guys test their malware against antivirus engines to ensure they can penetrate their signature and behavioral defenses. Then they feed their code onto software that generates variants. The timeframe between capture analysis and signature release is at best hours. In many cases it's days before the AV companies are able to respond. Av-test.org data shows that the number of unique malware samples has risen from about 3,000 per month in 2006 to 20,000 per month in 2009. Multiply these numbers by the number of variants, and it's no wonder that the most popular AV products have an 80 percent miss rate.