A+ Pop Quiz: Which is better, one or two – two or three A user in the sales department has just upgraded the operating system on their laptop. The user is reporting that the information on the screen is blurry in the new OS. Which of these is the MOST likely cause of this issue? A) The new OS is not designed for laptops B) The backlight is not working C) The video driver is not properly installed D) The LCD panel is faulty E) It's time for an annual vision check