Joe, an end-user, reports that the PC he uses periodically logs off his user account and displays a message that updates are being installed. Which of the following is the MOST likely cause of this issue?
A. Time of day restrictions are enabled on the machine
B. Scheduled antivirus scans and updates are enabled on the machine
C. Remote desktop is enabled and an administrator has logged into the machine
D. Automatic Windows Update is enabled on the machine