A technician has installed Windows Vista Ultimate and is setting up the Media Center. When the technician goes to watch TV, Media Center displays an error of no TV tuner installed. The TV tuner is installed with the correct drivers. Which of the following is the solution to the problem?（）

• A、TV tuner codec was not installed.
• B、Not enough RAM to support the TV tuner.
• C、Motherboard is faulty.
• D、Video card drivers are not installed.