5、could not start the service mysql

1, the reason is because there is no clean uninstall mysql multiple installations of reasons;

2, the solution is:

(1) delete the contents of the system mysql directory has been installed;

(2) while holding down "win + r" key to bring up the "Run", the input click "OK" after "regedit" in the box open the registry;

(3) the search key in mysql "\ HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet001 \ Services" in pairs and delete;

(4) Re-install the operating system reboot mysql;