The National Institute of Standards and Technology (NIST) has issued a draft publication to provide guidance to home users, including federal workers engaged in telework, on improving the security of home computers that run on the Windows XP Home Edition operating system.
Although in draft, this is still an extremely useful guide to home users on how to secure their machines.
Draft Special Publication 800-69, "Guidance for Securing Microsoft Windows XP Home Edition: A NIST Security Configuration Checklist."