StillSecure, a Louisville-based network security firm, connected six computers - with six operating systems - to the Internet for a week without any virus protection. The results: 4,892 direct attacks by viruses, worms and other types of malicious code, and 46,255 scans by remote computers looking for weaknesses. Here's what happened: Windows XP Service Pack 1 Attacks: 4,857 Results: Attacked successfully within 18 minutes by the Blaster and Sasser worms. Within an hour, the computer was taken over...