This Service Pack bridges the gaps between the original software and user requests more fully, responding to customer wishes and making XP even better. Security Center offers a central control system for your Windows XP security work with the firewalls, auto updates and antivirus tools Great news for people sick of pop-up ads . The built-in pop-up blocker controls them, with a new submenu and status bar icons New Add-Ons manager gives you instant access to all the Browser Helper Objects and extensions, enabling and disabling them easily Firewall now has its own control panel, for customizing firewall setting to suit any connection Enhancements to the Windows Update service make installing new updates easy . you can even choose which ones to install Wireless Networking .