If you are worried that your computer security has been compromised then I would suggest that you do all of the following:

• update your anti-virus definitions
• scan for viruses
• scan for spyware
• scan your firewall for leaks

By doing a firewall test you are checking to make sure that there are no security holes  that have been created by spyware or viruses that would allow hackers entry into your computer to steal personal information. I would suggest to check this regularly if you have gotten spyware or a virus recently.