You are a consumer support technician. A user installs ten applications from the Internet. The user notices that the hard disk drive of the user’s computer does not function properly, and it takes a long time to access the Internet.

An antivirus and spyware scan fails to detect the presence of malicious software.

You need to detect malicious software that is hidden from the antivirus and spyware scanning tools.

What should you do?

A.
Run the antivirus and spyware scans with the application priority set to the Real-time option.

B.
Download and run the RootkitRevealer utility from the Microsoft Web site.

C.
Run the antivirus and spyware scans with the application priority set to the High option.

D.
Download and run the MBSA (Microsoft Baseline Security Analyzer) tool from the Microsoft Web site.