单项选择题 You install Windows Vista on a computer for a user who is visually impaired. You need to configure a High Contrast color scheme on the computer. What should you do?（）

单项选择题 You install Windows Vista on a new computer. You update the video card driver and restart the computer. When you start the computer, the screen flickers and then goes blank. You restart the computer and receive the same result. You need to configure the video card driver. What should you do first?（）

单项选择题 You install Windows Vista on a new computer by using the retail installation media. You install a new hardware device. You are not prompted for any drivers and the installation completes successfully. You discover that an updated driver is available for the hardware device. You need to install the updated driver. What should you do?（）