单项选择题 A customer reports that error messages occasionally appear and quickly disappear. Which of thefollowing is the BEST place for a technician to begin troubleshooting this issue?（）

单项选择题 A user, Jill, is reporting her mouse is moving when Jill is not moving it, and the computer is running slower than normal. Which of the following is the FIRST action that Karen, a technician, should take?（）

单项选择题 Which of the following is the correct path a technician could follow to find the Services Snap-inconsole inside of Windows?（）