What should you consider when you think about the security of your home network? Understand the essentials.
Link: Home network security overview

Get started with a line of defense between your computer and those who might try to connect to it without your permission.
Link: Using Windows Firewall

Having a wireless network in your home is a great convenience for you, but you don't want it to be convenient for hackers. Learn the best practices for securing yours.
Link: How to secure your wireless home network with Windows XP

Set permissions so that people can share folders and files on your network.
Link:
How to set permissions for folders and files

Help to keep unauthorized people and software—such as hackers, viruses, and worms—from connecting to your computer.
Link:
Protect your network from viruses and malicious software

Make sure your computer always has the latest high-priority updates from Microsoft, including security updates that can help to protect it.
Link:
Keep your system up-to-date