How can I completly remove MySql on Windows7 because when I uninstal and I install agan there asking the old password, so the uninstall is not complet, there are remaining some data.
To completely remove MySQL (preferences etc), you need to uninstall it and then remove the corresponding directories.
As you're using 64-Bit Win 7, the directories you should delete are (most likely):
- C:\Program Files\MySQL *\
- C:\ProgramData\MySQL *\ (
ProgramDatais a hidden folder)
- C:\Users\yourname\AppData\Roaming\MySQL *\ (
AppDatais also a hidden folder)
When you've done that, you'll be able to reinstall using a completely new password.
All that said, you don't need to do this. You can instead reset the root password.