About MySQL installation, I am a novice, the first time I put CMD useless administrator privileges, cause the failure of installation, if encounter this kind of situation will only need to put the CMD debugging to the administrator rights with respect to OK, transferred to the administrator privileges of CMD input MySQL install, then it will prompt you to install the success, this is the right tip, and then on to the next step, net start MySQL, start the MySQL, when prompted to server startup success, there is nothing wrong with this step, and then continue to the next step: login login time continue to CMD input MySQL -u root -p will prompt you to enter the initial password, and then the initial password is at the beginning when initialized MySQL for you, if you didn't pay attention to the most direct and simple method is to initialize it again, if not just uninstall MySQL, reshipment, uninstall it must pay attention to the first stop MySQL, CMD input net stop MySQL, and delete MySQL installation directory file, and then can carry out the registry delete, Windows + r type regedit press enter into the registry, CRTL + f find on MySQL registry are deleted, and then you can reinstall the,