My current security configuration is as follows:
Security Systems

Operating System — Windows XP Home Version 5.1.2600 Service Pack 2 (2600)

1. Norton Internet Security 2005 Version 8.0.7.1 Symantic

a. Outbreak Alert
b. Personal Firewall
c. Intrusion Detection
d. AntiVirus
e. AntiSpam

2 .ZeroSpyware 2005 Version 3.4.110.4 fbm Software

a. Vulnerability Assessment
b. Intrusion Detection System
c. Manage Browser Plug-ins
d. Manage Cookies
e. Internet Chat Help
f. Remote Restore (Live Chat)

3. AdAware SE Pro Version 2005 Build 1.06r1

a. Lavasoft Ad-Watch Build 399

4. Ad Blocker Pro 2005 Version 2.00 3B Software

a. Clean
b. Allowed List
c. Notification
d. Check and Repair
e. IE Settings
f. IE/Plugins/BHO

5. Windows Registry Repair Pro 2005 Version 3.0.0.0

a. Scan Registry for Errors
b. Defragment Registry
c. Scan Registry for Custom Strings
d. Uninstall Manager
e. Hard Drive Cleaner
f. Registry Backup and Restore
g. System Information

6. *Windows Firewall (Microsoft)

Note* Usually disabled when running Norton.