I've updated El Cap. Now my screen is black! I lost the picture of El Capitan. What should I do?

I've updated El Capitan for the updates. Now my screen is completely black. I dash downstairs, but I lost the lovely picture of El Capitan.  Can someone please instruct me on what to do?

If it's something simple, you should be able to go into system preferences (should be the train in the doc) and click on the item in the 'desktop and screensaver' top line and reset

Tags: Mac OS & System Software

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