A technician recently removed a malware infection from a client’s computer. After removing the computer from the network, the technician used an approved customized tool to remove the malware, then updated the antivirus suite, and performed a scan that reported the system was clean. A week later, the client reports the same malware infection has returned. Which of the following is MOST likely the cause of the reinfection?
A. The technician did not disable the System Restore utility
B. The technician ran the malware remover before the antivirus scan
C. The technician did not install a second antivirus suite to complement the first suite
D. The technician did not put the computer back onto the network