System automatically goes to the boot menu on start up

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When I start my DELL Laptop, It automatically takes me the boot menu.
and I have to press Esc button to quit the menu and to go to the normal page.
And when I reach the normal page, some buttons don't work properly.

I have faced this issue twice before. And when I am about to go the service centre, it automatically gets free out of problems and behaves normal.

Can anyone help me ?