Anti-Virus Software
F-Secure - With F-Secure Anti-Virus 2005, you can open e-mail attachments and use your PC without fear of virus infections. F-Secure has been designed to automate all key tasks required to keep your computer and data safe from viruses.
Norton Antivirus - This software can remove viruses, worms, and Trojan horses automatically without interrupting your work
McAfee VirusScan
Trend Micro PC-cillin
Free Anti-Virus Software
Avast - Offers a free home edition for personal use.
Grisoft AVG - Personal version is free to use for a home user.
Firewall Software
ZoneAlarm - A good free firewall from Zonelabs for individuals and not-for-profit charitable use. They also offer more advanced firewalls ZoneAlarm Pro for a small fee.
Norton Personal Firewall - Another very widely used firewall, you can download a trial version for free.
McAfee Personal Firewall
Sygate Personal Firewall
Tiny Personal Firewall
Anti-Spyware
Spybot Search and Destroy - A great program, and totally free to use. This can be an alternative to Ad-aware [see below] but together they can make great protection.Ad-aware - The most popular anti-spyware programs out there. Ad-ware (the personal version) is free to use.