A technician is dispatched to troubleshoot a slow performance issue on a PC. Upon arrival, the technician immediately opens Task Manager and sees that CPU and RAM performance are within normal ranges. The technician then checks and verifies the speed and duplex settings and performance on the network card. The technician then temporarily disables the antivirus to see if performance is affected, and it is not. After re-enabling the antivirus, which of the following is the NEXT best step for the technician to take? 

Answer options:

A. Check to see if insufficient hard drive space is causing the issue
B. Update the operating system, drivers, and firmware on the PC
C. Log into the PC with another user profile and test performance
D. Shut down the PC, unplug the power for 30 seconds, and then boot the PC

A