As I'm using Linux as my primary OS, I don't pay as much attention to the latest releases of Windows security software as I used to. That's one of the advantages of Linux, it is much more secure out of the box. However, while updating my mother-in-law's computer while she was visiting this week, I noticed that there is a major new version of Comodo Firewall, the best freeware software firewall available for Windows XP and Vista according to many security experts -- the best free or paid software firewall available according to some experts.