You can run as much anti-virus software as you can afford, but that's still no substitute for common sense. Remember: today's cyber criminals are continuously updating the malware that they have managed to install on a victim's computer. No safeguard is good enough if the computer user does not remember to stay away from links or open attachments that arrive unexpectedly via email or instant messaging. Also, remember that anti-virus programs are the most effective when part of a layered security approach. That includes frequent software patching and using a (hardware and/or software) firewall. Every IT department should have a secure system, using the latest technology and making sure that computer users are properly trained.

For more on the best kind of security:
- See this Washington Post article [1]