(Every windows administrator will use various tools in the face of cumbersome management work. In the face of a large number of uneven tool choices, have you started to feel dizzy and don't know what to do? Before choosing the tools you want, it is necessary to understand your needs. How much do you spend on management tools? Do you need tools to monitor performance, solve security problems, or for other purposes? No matter what you need, this technical manual, which includes various management tools, can help you. There are many free tools, performance monitoring tools and security tools.)