You are a consumer support technician.
Four users share a computer that runs Windows Vista. One of the users reports a problem. When the user logs on to the computer, a black window flashes open and then quickly closes. The user also reports that the computer performs poorly. The other three users do not experience these problems.
You suspect that the computer performs poorly because of malicious software.
You need to identify the source of the malicious software.
What should you do?
A.
Run the SFC.exe utility to identify modified system files.
B.
Look for *.cmd and *.bat files in the Startup folder of the All Users profile under Program Data.
C.
Run msconfig.exe and verify the startup application.
D.
Analyze the %systemroot%\system32\autoexec.nt file.