Which action is likely to help prevent infections from viruses?

Regularly updating software and operating systems is an effective method for preventing infections from viruses. Software updates often include patches that fix vulnerabilities within the system that could be exploited by malicious actors. Keeping both the operating system and applications up to date ensures that any known security flaws are addressed, thus providing a stronger defense against potential attacks.

In addition, many software updates come with enhanced security features that can provide better protection against emerging threats and viruses. This proactive approach not only mitigates risks but also ensures that the system is equipped to handle the latest security challenges.

In contrast, opening all email attachments puts systems at risk since email is a common vector for virus distribution. Using outdated antivirus software leaves systems vulnerable to infections as it may not recognize or protect against newer virus signatures. Disabling firewalls removes a critical line of defense that helps to monitor and control incoming and outgoing network traffic, further increasing vulnerability to attacks and infections.