单项选择题 While disassembling a laptop the FIRST thing that should be done is:（）

单项选择题 A technician wants to prevent employees from installing software on company computers. In which of the following groups should the employee accounts be placed?（）rs

单项选择题 A user reports that the computer’s hard drive is constantly running and the hard drive light is constantly flashing. Which of the following tools would be used to resolve this issue without losing data?（）