How can you effectively prevent viruses and malicious code?

To effectively prevent viruses and malicious code, scanning all email attachments is crucial. This practice helps in identifying potentially harmful files before they can be executed on your system. Scanning utilizes antivirus software that checks for signatures or patterns associated with known viruses and malware, which can stop malicious code from entering your environment. By ensuring that every attachment is scanned, you add an essential layer of security, minimizing the risk of infection or compromise of sensitive data.

The other options do not provide the same level of protection. For instance, emailing infected files to your security Point of Contact (POC) does not prevent the initial infection and could inadvertently spread the virus further. Viewing emails using the Preview Pane might seem safer, but it doesn't eliminate the risk of being impacted by malicious code if the email contains harmful scripts that run in the background. Allowing mobile code to run on all websites exposes your system to significant risks, as it opens the door for potentially harmful scripts to execute without your consent. Therefore, the most effective preventive measure among the choices is to scan all email attachments.