A technician was called to check an unexpected clicking noise on a desktop that has become more frequent every time a video editing application is loaded. The system fans have been replaced, but the clicking noise remains. Diagnostics have been run on the video card. Which of the following should me the technician do FIRST?
A. Replace the hard drive.
B. Replace the video card.
C. Do a System Restore.
D. Perform a full data backup.
E. Scan the system for viruses.