Are you getting the error:
The specified password for user account 'root' is not valid, or failed to connect to the database server.
when you are trying to install WordPress via the Microsoft Web Platform Installer?
If you are 100% sure that you have the right password this post might help.
It would be in your best interest to try and log into the MySQL server using the root/password combo you think is correct. As long as you can login here the rest of the post will apply to you.
You can do this either through LanBench or MySQL command line.
I will use the command line tool. It will ask you what the root password is right off the bat.
If the password is correct you should see something similar.
The next thing you need to do is download and install the MySQL .NET Connector. Once you install the connector the install should proceed!
Good luck. I hope I helped you fix “The specified password for user account ‘root’ is not valid, or failed to connect to the database server.” error!