Answer:
anti-malware software.
Explanation:
An anti-malware software can be defined as a software application or program designed to avail end users the ability to protect their computer system and other end devices from malicious programs (malwares) such as rootkit, worms, adware, spam, spyware, etc.
Some examples of anti-malware softwares are Avast, Comodo, Kaspersky, Norton, Eset 360 etc.
Hence, the best way to help prevent a system from a worm attack is to use an anti-malware software.
Basically, anti-malware software has some inbuilt techniques such as sandboxing, behavior monitoring and malware removal feature designed to help prevent a system from a worm attack and other malicious programs.
