单项选择题
A. BIOS on the system board needs to be updated.
B. The power supply is providing insufficient wattage.
C. The incorrect video drivers are installed on the computer.
D. Too many startup applications are running.
单项选择题 A technician has just completed a CPU upgrade on a motherboard. Which of the following will MOST likely cause the PC not to boot?（）
单项选择题 A user needs assistance in troubleshooting a printing problem. The print job seems to process correctly at the workstation but never comes out of the printer. Which of the following should atechnician recommend?（）
单项选择题 After visiting the Windows Update website on a Windows 2000 computer and installing all updates, a user reports that they are unable to select any resolution above 640X480 with sixteen colors. Which of the following procedures should the technician complete FIRST?（）