mysql 启动出现系统错误193

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本文解决了一个常见的MySQL服务启动失败的问题，错误提示为“不是有效的Win32应用程序”。问题出现在MySQL守护进程文件mysqld.exe损坏导致，解决方案是替换该文件。

当： net start MySQL 时：
发生系统错误 193。

不是有效的 Win32 应用程序。

百度了N久没找到问题，google了一下，在
http://big.info/2014/01/windows-could-not-start-mysql56-service.html 上找到一点问题，
发现D:\mmysql\mysql-5.1.55-win32\bin 有个mysqld的空文件，删除他即可。

I have read that there might be several reasons for this error. I did some googling and nobody was mentioning my reason of getting this error so I though sharing my case and my solution could help others.

As I said, in my case the problem was with the MySQL Daemon. If you have used the default installation, you could find the daemon under “C:Program FilesMySQLMySQL Server 5.6bin”.
Note: This is for version 5.6. Might change depending on your version of installation.

Check the size of mysqld.exe file. If that is 0 bytes then you have blown the deamon as I did.

To fix this you can just copy a good mysqld.exe file from another MySQL installation’s “C:Program FilesMySQLMySQL Server 5.6bin” directory. Make sure that the installation versions are the same.
Then the error message should be gone. Your MySQL should work now.