Self starting slide show

I have an HP Touchsmart running Microsoft Windows 7 Home Premium 64-bit Edition. This computer is supposed to be in a lobby running a slide show. I don't want it to run 24/7 but would like it to shut down/hibernate from 5:30pm to 7:30am, and when it comes back online it should run the slide show. Turning off and restarting manually is difficult due to its location. Any suggestions on how to do this?

Thanks for the suggestion, but the computer is a stand-alone. Maybe I should ask a more important question: will it cause more harm to the computer to leave it running 24/7 with the slide show continually on? Or is it better to keep it hibernated at night and start it up again in the AM?

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