A user attempted to install an application on a desktop, and the installation attempt failed. A technician compares these installation files to those on another user's machine and finds the files are different. Which of the following should the technician do NEXT?


A. Attempt to reinstall the application.
B. Verify the system functionality.
C. Test the functionality of the antivirus.
D. Complete the final report.
E. Determine the source of the installation file.