单项选择题 Core files required for user applications are stored in which of the following locations?（）

单项选择题 A technician is preparing user education to raise awareness of malware. The technician’s goal is to increase user awareness and prevent the future spread of malware. All of the following are malware symptoms EXCEPT:（）

单项选择题 A technician is preparing to update the BIOS on a laptop. Which of the following should thetechnician do to prevent problems during the update?（）