I know this question has been asked in the past, but a satisfactory answer has not been provided.
I am using the SC command to config the credentials for a service.<
Try This. Start menu - type "local security policy" without the quotes. Open the "Local Policies", then left-click on "User Rights Assignment". On the right panel, right-click on "Log on as a service", and select "Properties". Click on "Add User or Group" and add your user. Click OK. You might have to reboot your machine.
After adding you can set the user name and password for the service in cmd.