Troubleshoot Windows installation MySQL 5.5, run MySQLInstanceConfig.exe no response method

I installed MySQL5.5 (Community Edition) on a Windows Server 2003 virtual machine. This virtual machine was previously installed by someone else MySQL5.5 and MySQL5.0, but forgot the root password, so reload. No unexpected problem encountered when configuring MySQL instance MySQLInstanceConfig.exe not responding. (I remember the previous encounter this problem, and decisively changed the MySQL5.0, bypassing but not resolved)

Tried a lot of methods, there is a need to run as administrator (it is said that the installation on the WIN7 is the problem, and I use Windows Server 2003, the original user is administrator), said to the installation directory and registry to remove the clean , but none of them succeeded.

Finally, view C:\Program files\mysql\mysql Server 5.5\my.ini to find

Basedir= "C:/Program files/mysql/mysql Server 5.5/"

Datadir= "C:/Documents and Settings/all users/application data/mysql/mysql Server 5.5/data/"

DataDir found that the directory is indeed not removed cleanly, so delete the entire directory c:/documents and Settings/all users/application data/mysql/, uninstall and reinstall, and finally succeed.

Conclusion:

1, MySQL5.5 in the installation of Windows on MySQL is indeed a MySQLInstanceConfig.exe not responding to the problem, MySQL5.0 will not.

2, the cause of this problem is indeed the last MySQL instance uninstall did not uninstall clean caused, but the most critical to clean up garbage is not the registry but MySQL DataDir.