Encontrei uma solução no Server Fault: Como posso redefinir a senha do MySQL?
Using Windows 7, here's what I had to do:
- Uninstall MySQL using the uninstaller
- Delete
C:\Program Files\MySQL
- Delete
C:\Program Files (x86)\MySQL
- Delete
C:\ProgramData\MySQL
- Delete from any Users' AppData folders. Example:
C:\Users\rdoverby\AppData\Roaming\MySQL
- Reinstall MySQL