A Windows workstation that was recently updated with approved system patches shut down instead of restarting. Upon reboot, the technician notices an alert stating the workstation has malware in the root OS folder. The technician promptly performs a System Restore and reboots the workstation, but the malware is still detected. Which of the following BEST describes why the system still has malware?

A$.$ A system patch disabled the antivirus protection and host $9$rewall.

B$.$ The system updates did not include the latest anti$-$malware de$9$nitions. C$.$ The system restore process was compromised by the malware.

D$.$ The malware was installed before the system restore point was created.