Update malicious code protection mechanisms when new releases are available.

In general, anti-malware software compares a file against a signature database to decide if the file is malicious. For anti-malware software to be effective the signature database must remain updated. If the signature database is outdated then it can not detect new malware.

Configure your anti-malware software to update its malware signature database. The updates should be periodic (e.g. every day at 8:00 AM) and automatic.