The Internet can be a scary place. There's viruses out there, spyware and adware from shady companies, and always someone trying to hack in and take a piece of what's yours. To protect yourself virus'>Kaspersky being a late, but powerful, addition.
Anti-Virus Software
If I had a nickel for every time I turned off my anti-virus software and regretted it later...
Antisubscription'>subscription option, which is highly recommended, because it will keep your protection up to date with definitions for the latest viruses out there.
Here's some of the more popular Antivirus, spyware, adware and firewall:
* McAfee Total Protection 2010 from McAfee, Inc.
* is excellent and has a free version with subscription available at their website