writes, "This article from the BBC shows how vulnerable XP Home really is. Using a highly protected XP Pro machine running VMWare, the BBC hosted an unprotected XP Home system to simulate what an 'average' home PC faces when connected to the internet."
From the article: "Seven hours of attacks: 36 warnings that pop-up via Windows Messenger. 11 separate visits by Blaster worm. 3 separate attacks by Slammer worm. 1 attack aimed at Microsoft IIS Server. 2-3 "port scans" seeking weak spots in Windows software."
The machine was attacked within seconds of being connected to the Internet, and at no time did more than 15 minutes elapse between attacks.