单项选择题 A user reports that a network printer will not print, however, other users are not experiencing any problems. The user has rebooted their computer twice and it is still not printing. Which of the following should the technician check?（）

单项选择题 Recently three new applications were installed on all the desktops in a company branch. One of the applications causes Windows to crash on startup, but the technician is unable to find out which application it is. Without removing all three applications, which of the following is the BEST way to determine the cause of the crash?（）

多项选择题 A user is reporting that a PC will suddenly shut down without warning. The PC boots up with no problems, but after using the PC for a short time, the PC turns off. Which of the following components should the technician check?（） (Select TWO).