PC Security Test is a free program that helps you to test this. It simulates different attacks on your computer and monitors the responses of your protection software. So the users can easily control the efficiency of their protection software such as anti-virus programs, spyware scanners and firewalls.
After installing (while installing just ignore your security program’s warning) the software, run it and click on ‘Standard checks’, then ‘Start’. If your Anti-virus program or Firewall reports the attack, it is a good sign. If the security programs fail to report them, then they are probably not updated or not configured correctly.
You can also check your email client and web browser for security loop holes. PC Security Test latest version works on Windows 95 / 98 / ME / 2000 / XP and Vista.