Answer:
Scan the system for malware.
Step-by-step explanation:
The computer system is an information technology system that holds information received by the user in the network and also created by the user for official purposes.
Malwares like virus, worm, trojan horse, rootkit etc are used by attackers to weaken the security of computer systems in a network and even the network security policies. Antivirus softwares are used to detect and remove malwares from system. It must be updated regularly alongside the computer's operating system, for malware signature update.