I tried to run my Oracle Developer installationa received an error messageĀ  as shown by the screenshot below:

Unable to OpenSCManager: err=5
TNS-12560: TNS:protocol adapter error
TNS-00530: Protocol adapter error

When you search, you will come upon many forums telling you to run the lstnrctl start or lstnrctl status command. None of those fixes may work for you, as what happened to me. The solution is simplier than you think.

The problem happens to be that Oracle does not know that you are the administrator of the device that the app is located on, so you have to run the cmd command and right click on it and select, Run as administraor and and then run the lstnrctl start command.

C:\Windows\system32>lsnrctl start

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