<A target="_blank" href="http://www.cio.com/article/500389/Is_Your_PC_Bot_Infested_Here_s_How_to_Tell?source=rss_news">Millions of PCs around the world</A> are infected with malware without the user's knowledge. This article gives some tips on keeping your PC clean, including the use of <A target="_blank" href="http://www.bothunter.net/">BotHunter, free software</A> from the Cyber-Threat Analytics project.