单项选择题
A. In the BIOS, the onboard video adapter must be disabled.
B. The video resolution is set too high.
C. The LCD panel is defective.
D. The drivers for the new video card must be installed before installing the card.
单项选择题 Which of the following utilities can display drivers installed on a local Windows XP machine?（）
单项选择题 Which of the following is the purpose of the sigverif.exe utility?（）
单项选择题 A technician is performing a memory upgrade by installing an additional 1GB stick of DDR RAM into a system. When the installation is complete, the computer shows 2GB of RAM at POST; however, it now indicates a lower speed setting for the memory. Which of the following is the MOST likely cause?（）