This is the software publishers description:

Stay protected from spam and personal information theft while keeping your children protected from inappropriate websites.

The Norton Internet Security Add-on Pack works with Norton Internet Security 2007 to provide additional security features. These features provide you with protection against spam, having your valuable personal information stolen along with protecting your children from inappropriate web sites.

Norton Antispam
Automatically filters out annoying and dangerous fraudulent or phishing emails from your email in-box.

Norton Parental Control
Blocks access to Web sites not suitable for children.

Confidential Information Blocking
Alerts you if unauthorized sensitive personal information is being sent out over the Internet via email, instant messaging or web pages.

Ad Blocking
Keeps banner ads and pop-up and pop-under windows off the screen for faster web browsing.

System Requirements:

• Windows XP Home, Professional Edition, and Media Center Edition
• 300MHz or higher processor
• 256MB of RAM minimum
• 100MB of free hard disk space
• Microsoft Internet Explorer 6.0 or higher

Other supported software

• Standard web browsers
• Standard POP3 and SMTP compatible email clients, like Outlook and Outlook Express
• AOL Instant Messenger 4.3 or higher
• MSN Messenger 6.0 or higher
• To install the Norton Internet Security Add-on Pack, you also must have Norton Internet Security 2007 installed on the same computer.

The Norton Internet Security Add-on Pack requires that you have Norton Internet Security 2007 installed. If you choose to download and install the Norton Internet Security Add-on Pack, you will have the right to use it until the expiration of your current subscription, subject to acceptance of the Symantec License Agreement included with this product and available for review at www.symantec.com. Protection updates and new product features as available during your subscription period are included. Product features may be added, modified or removed during your subscription period