MySQL Users are gone (lost) after a MySQL 5.5 update in MS Windows

(Doc ID 2346803.1)

Last updated on APRIL 03, 2018

Applies to:

MySQL Server - Version 5.7 and later
Information in this document applies to any platform.

Symptoms

After Updating MySQL 5.5 to a newer version using the .msi installer (for example: mysql-advanced-5.5.58-winx64.msi) all the existing MySQL users and gone, and it's not possible to login into MySQL even using the root account

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms