Write down your security key and keep it in a safe place. You can also save your security key on a USB flash drive by following the instructions in the wizard.
Use a firewall. A firewall is hardware or software that can help protect your computer from hackers or malicious software. Running a firewall on each computer on your network can help control the spread of malicious software on your network, as well as help to protect your computers when you're accessing the Internet. Windows Firewall is included with this version of Windows. For more information, see Firewall: frequently asked questions.