A user has downloaded and installed a browser add-on that causes the browser to hang. The PC has very slow system response when rebooted. Which of the following should a technician do to troubleshoot this problem?
A. Run System Restore, update antivirus program, and run an antivirus scan.
B. Remove all Internet temporary files, run an antivirus scan, and reboot using Last Known Good Configuration.
C. Remove all temporary files, turn off System Restore, update and run an antivirus scan.
D. Run an antivirus scan, Run Disk Cleanup, and reboot into Safe Mode.