A user has an outdated version of an operating system for which support is no longer available. The browser is also out of date. Which of the following should the user do to BEST protect online…

Installing and configuring a firewall is important for network security, but it may not protect against malware already present or introduced through browser exploits that bypass network filtering.

An outdated operating system and browser are highly vulnerable to various forms of malware, including those designed to steal sensitive information like banking credentials. An antivirus program provides essential protection by detecting and removing malicious software, offering a critical layer of defense on an otherwise unpatched and unsupported system.

Installing and using another browser might update the browser's security, but the underlying, unsupported operating system remains a significant vulnerability that an antivirus can help mitigate.

Installing and configuring an IDS (Intrusion Detection System) monitors for suspicious activity but typically does not actively prevent or remove malware, which is crucial for protecting against banking information theft.