You are a desktop support technician for your company. The company has a main office and several branch offices. The network consists of one Active Directory domain.

A remote user uses a portable computer that runs Windows XP Professional. The user’s account is a member of the local Administrators group on her computer.

The user recently installed Windows XP Service Pack 2 (SP2) by using Automatic Updates. Since installing SP2, she cannot use the company communication software. The software worked correctly before she installed SP2. The user did not make any changes to Internet connection settings since the software last worked.

What is the most likely cause of the problem?

A.
The software is not compatible with Windows XP.

B.
The ports used by the communication software are blocked by a firewall on the user??s computer.

C.
A system administrator needs to update the user??s account to allow SP2.

D.
The user needs to log on locally to the computer for the software to work with SP2.