Start by opening the "Windows Security" utility by opening your "Start" menu and selecting the "Control Panel". Secondly, click on the "Windows Firewall" option to change the settings for your firewall. Next, click the configure your Internet security settings. Another step, click on "Automatic Updating" in the Windows Security Center to configure your system's update settings. Lastly, select the "Malware Protection" option to edit malware settings if you are using Vista. Read more details from?http://www.ehow.com/how_5210274_change-windows-security-settings.html#ixzz1zEDQgpd4.