单项选择题 A user installs a laser jet printer on a Windows XP desktop. The user states that Windows XPgeneric printer drivers were used. When the user prints a document, the pages are printing out with random symbols, letters, and numbers. Which of the following should the technician do?（）

单项选择题 After Microsoft Windows boots, a message appears stating that a service failed to start. Which of the following can be used to find more information about this error?（）

单项选择题 A virus scanner is running on a computer and scans all files currently in use. Why should a full scan be performed periodically?（）