Many consumers are under the assumption that their internet service provider (ISP) offers enough protection against hackers, thieves, and viruses. This simply is not true. Most high speed internet connections are unprotected. Anonymizer ZoneLabs Zone Alarm Pro aggressively protects home computers from being hacked into with a simple user interface and an inexpensive price tag.

ZoneLabs Zone Alarm Pro Features:

* Checks incoming and outgoing e-mail for viruses. This is important because the majority of viruses are spread from email to email.
* Logs anyone trying to access the computer illegally and then collects information about that person. This information includes IP, e-mail address, and internet provider. The user can then contact the hacker's internet provider and advise them of the malicious activity.
* Zone Alarm Pro is password protected so only an authorized user can access and change the settings.
* 24-hour customer support.

You can also download a good free firewall.
Outpost firewall would be a good choice.
Download from here free.