A technician has cleaned a virus infection off of a PC using corporate approved software. After a short period of time, the infection returned. Updated virus signatures

have also detected the presence of a rootkit. Which of the following would be the BEST course of action to resolve the issue?

A. Run a System Restore to a time before the first infection was cleaned.

B. Install a second antivirus suite and run both

antivirus products concurrently.

C. Back up the client-s data and scan it for infections on a known-working PC.

D. Reformat the hard drive and reload the operation system and applications