If you are using Nortin Internet Security, you can download their “Add-on Pack” for free which includes the Spam Filter and Parental Controls.
Their link is here:
They describe it as:
“Block unwanted or offensive online content with per-user account parental controls and antispam in the Norton™ Add-on Pack 2008, an optional download for Norton Internet Security 2008 and Norton 360 customers (available at no additional cost). The Add-on Pack also includes a confidential information blocking feature to prevent all sensitive private data that you specify from being transmitted out of your computer.”