When I went home today, I encountered this inexplicable error. I did not solve the problem by turning Google and Baidu over several pages. Most of them were copying and pasting an answer. ini errors, which have been reinstalled for a long time, reconfigured, and restarted have not worked. By the way, I hate those who like to copy and paste the so-called "gold coins, one page contains the same paragraph. I tried several methods that Google had not solved. Then I suddenly remembered the iis port usage when I started apache (because apache also used port 80 ), therefore, when you open the command line netstat-aon | findstr "3306", the result shows that a "depend on" message is silently entered, and the port is occupied. Then, tasklist | findstr "416": The result shows that the progress process is restarted. Configure the nasty accelerator as not hidden in the taskbar and not started when it is started, in order to prevent future failure to find the cause when such a problem occurs, disable it, and then run tasklist | findstr "416". The result is that the mysql service is started and solved successfully .... I would like to note that it will help the users who use Youku accelerator and use mysql's default port 3306, co-author James White