Samsung forum: how to turn off the store demo mode on a UN46B6000?

Normally, you would select Home mode during inital set-up or "Plug and Play". On my set, you can re-select this by pressing volume then holding the Enter key for 5 seconds - check your user guide in case it's different.

Thanks to those who post these answers. It has helped me many times.

The Menu+sound hold advice was posted in many forums. It did not fix my new monitor connected to my PC by HDMI cable. Store Demo menu continued to cover the Windows Menu and all my settings were replaced by Store Demo settings.

Here is what solved this Samsung created problem: Turn off and unplug the power to the monitor. Remove the HDMI connection. Connect with a VGA cable. Turn on the monitor. Source, select PC. A choice comes up, Home or Store Demo. Choose Home. A welcome screen comes on. Press remote INFO to verify Store Demo is gone. Turn off and unplug the power. Change connecting cable to HDMI or DVI as you prefer. Plug in and turn on power. Change Source to HDMI or DVI to match connection. Change display settings as necessary to fit your use and preferences. Problem is solved.