In addition to updating and using what you currently have you may want to consider the following:

Use a Firewall - I can not stress how important it is that you use a Firewall on your computer. Without a firewall your computer is succeptible to being hacked and taken over. Simply using a Firewall in its default configuration can lower your risk greatly. Here are some free and evalutation versions that provide
better security than the Windows Firewall.


For a tutorial on Firewalls and a listing of some other available ones see the link below:
Understanding and Using Firewalls

Install SpywareBlaster - SpywareBlaster will added a large list of programs and sites into your Internet Explorer settings that will protect you from running and downloading known malicious programs.
A tutorial on installing & using this product can be found here:
Using SpywareBlaster to protect your computer from Spyware and Malware

Install Winpatrol - 
Use Winpatrol to take control of your PC and provide another layer of security. 
Help file and tutorial can be found Here

Block unwanted parasites with a custom hosts file -
http://www.mvps.org/winhelp2002/hosts.htm

Visit Microsoft's Windows Update Site Frequently - It is important that you visit http://www.windowsupdate.com regularly or set your computer to receive automatic updates. This will ensure your computer has always the latest security updates available installed on your computer. If there are new updates to install, install them immediately, reboot your computer, and revisit the site until there are no more critical updates.

Update all of your Anti-Malware programs regularly - Make sure you update all the programs I have listed and the ones you are currently running regularly. Without regular updates you Will Not be protected when new malicious programs are released.

Keep your applications up to date -
Use Secunia Personal Software Inspector to help stay on top of application updates that could leave your PC vulnerable to attack.

I'll leave the thread open a few days in case you have questions or issues.

Regards,
 



--------------------
 

"To find perfect composure in the midst of change is to find ourselves in nirvana."


 

Suzuki Roshi