Well, now I worked around the mySQL logon problem. I had a look on Google, and, other users have had an issue with the default logon credentials for mySQL, and I had installed two versions of mySQL, one manually, and, another one - that included the phantom (unknown) logon credentials, was included by the installation of the Microsoft Web Platform.
However, now I'm stuck with trying to complete the wordpress installation, since, having copied the automatically generated wp-admin.php within my virtual directory on IIS (..inetpub\wordpress\), the installation wizard (wp-admin\install.php) seems to be going around in circles as it is not finding the database that I have created through mySQL.
I think that there is a permissions problem that needs to be resolved to allow .PHP scripts to write within inetpub, even though unexpected since I am logged on as an Administrator. Any idea how to go about it?