单项选择题 A technician is troubleshooting a user’s problem; important Windows services are not starting. In which of the following locations should the technician check to investigate when these services started or stopped?（）

单项选择题 Bob, a technician, needs to backup a user’s local My Documents on a Windows XP workstation.Which of the following is the QUICKEST way to the user’s folder?（）

单项选择题 Which of the following is the MOST likely cause of a low wireless signal after an internal wireless adapter on a laptop was replaced?（）