Final answer:
It is true that not keeping antivirus software up to date is a security weakness in many home systems. Updated antivirus software protects against the latest threats. Failure to update can leave the system vulnerable to new viruses and known security gaps.
Step-by-step explanation:
The assertion that a security weakness in many home systems is that users do not keep antivirus software up to date is true. Antivirus software is designed to protect computers and other devices from viruses, malware, spyware, ransomware, and other threats. Keeping it up to date is crucial because it ensures that the software can recognize and defend against the latest threats which are constantly evolving. Companies regularly update their antivirus programs to counteract these new threats, and if users do not install these updates, their devices become vulnerable. In many cases, new viruses are developed to exploit known security gaps, and updates often include patches to close these vulnerabilities. Therefore, failing to update antivirus software leaves the system open to these predictable attacks.