Which of the following would be the best action to prevent malware infections?

Installing and regularly updating antivirus software is one of the most effective actions to prevent malware infections. Antivirus software is specifically designed to detect, quarantine, and remove malware from devices. It continuously scans incoming and outgoing files, emails, and downloads to ensure that malicious software does not enter the system. Moreover, by keeping the software up to date, users benefit from the latest protection against new and evolving threats, as antivirus providers frequently release updates to tackle these issues.

While regularly clearing browser history can help maintain privacy, it does not directly protect against malware. Using public Wi-Fi networks poses significant security risks, as these networks can be less secure and more susceptible to attacks like man-in-the-middle. Limiting software applications to just one can result in a lack of necessary tools or security measures and does not inherently safeguard against malware threats. Hence, the best practice for protecting against malware infections is indeed to install and consistently update antivirus software.