Visiting a well-trafficked, seemingly trusted website won't necessarily save web surfers from getting malware installed on their computers, according to security firm Barracuda Networks. Throughout February, its labs team studied ranking firm Alexa's top 25,000 domains and found that 58 sites were serving drive-by exploits. Scaled out, that means hundreds of thousands of users may have been prone to malware if their machines weren't fully patched with the latest software updates, such as for Java. But don't throw away the computer just yet: Mainstays like Google, Facebook and Yahoo weren't foisting the malicious content. Instead, it was sites like free-tv-video-online.me.