Completely Unistall MySQL

Whenever you install MySQL, uninstall it and try to install it again, you might not be able to do so because MySQL will ask for the old password. You cannot install MySQL if you do not have the old password. Solution for this is:

• Uninstall MySQL
• Go to your MySQL installation folder for e.g. C:\Program Files and delete the MySQL folder
• Delete MySQL from your AppData folder. I am using windows XP and in my case, the location is C:\Documents and Settings\All Users\Application Data. Here you will find MySQL folder. Delete this folder.
• Finally, reinstall MySQL and you should be able to install it successfully.