In order to log on to DB console running on a Windows platform, the user with which you (want to) log onto the host must be granted the privilege to log on as a batch job.
* Go to control panel/administrative tools.
* click on “local security policy”.
* click on “local policies”.
* click on “user rights assignments”.
* double click on “log on as a batch job”.
* click on “add” and add the user that was entered in the “normal username” or “privileged username” section of the EM Console.