Answer:
You should install an antivirus software.
Step-by-step explanation:
An antivirus can be defined as a software application or program designed to avail end users the ability to prevent, protect, scan, detect, quarantine (move) and even to delete various viruses and malicious programs (malwares) such as rootkit, adware, spyware, etc., from a computer system.
Some examples of antivirus softwares are Avast, Kaspersky, Norton, Eset 360 etc.
In this scenario, your business uses instant messaging to enable technical support personnel to communicate easily with customers.
Hence, what you should do to secure technical support computers against potential instant messaging security risks is to install an antivirus software.