You are a desktop support technician for your company. All client computers run Windows XP Professional with Service Pack 2 (SP2) and are part of a domain.

A user reports that his computer performs more slowly than usual. You display the processes in Windows Task Manager. You discover that the CPU usage is 99 percent. In addition, you notice that Msblast.exe is running as a service.

You need to optimize the performance of the user’s computer.

What should you instruct the user to do?

A.
Restart the user??s computer by using the Last Known Good Configuration option.

B.
Install updated antivirus signatures, and scan for known viruses.

C.
Use Windows Task Manager to end the Msblast.exe process.

D.
In Security Center, click Change the way Security Center alerts me, and select Virus Protection.