How to upgrade mySQL 4.0.x to 4.1.x

I assume that mysql is installed under directory C:MySQL

- Download the latest version of MySQL 4.1.x without the installer ( Unzip in C: ) from
http://dev.mysql.com/downloads/mysql/4.1.html

- Make backup of C:MySQLData folder. This is very important as all the DB and tables are stored under this directory.

Now before proceeding, you must stop the mysql server.

Now rename the data folder to data_original

Extract the new installer files to C:MySQL ( replace all existing files )

Delete the Data folder ( it will just have to DBs MySQL and Test ) and rename data_original folder back to data

Configure my.ini to use old password format. If you dont know how to do that refer to file or use the file from URL http://www.rubal.org/download/my.ini.txt

Restart mysql service.

And all is done.

Hope this helps.

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