问题
I recently uninstalled and reinstalled MySQL (on Windows 7) using the installer. When I try to set up the MySQL Server, it won't let me continue unless I enter the "current" root password??? I don't understand how there can be a current root password if I completely uninstalled and reinstalled the program.
I've tried with a blank password as well as every password I can possibly think of that I would have used and nothing works. Google is completely unhelpful as every result I've found either refers to a "homebrew" installation, whatever that is, or refers to installations on Linux. Is there some folder of config files that the uninstallation refuses to delete that I need to remove manually? Or am I missing something else?
回答1:
After uninstallation process, please check following directories if it exists and remove:
- C:\Program Files\MySQL
- C:\Program Files (x86)\MySQL
- C:\ProgramData\MySQL
- C:\Users[User-Name]\AppData\Roaming\MySQL
PS: Please keep in mind that If you have multiple MySql Instances installed on your workstation, you need to go into each directory and delete only the relevant instance.
回答2:
In a fresh development machine, after installing MySQl 8.0.18 in Windows 10 64 bit, I hit this error and could not connect to MySql.
Nothing else worked.
Then I uninstalled the Mysql and deleted C:\Program Files\MySQL and retried installing MySql 8.0.18 and while re-installing it asked to specify root user password.
After specifying the root password, I was able to connect.
来源：https://stackoverflow.com/questions/54428037/installing-mysql-and-checking-root-password-fails