Left click start menu makes desktop icon disappear.

A customer brought me a machine with an issue I have never seen before. All desktop icons were gone and the only thing on the desktop is 3 lines in the upper left (opens an empty start menu), 3 lines in the lower left (opens all programs list) and the power button above that. I have managed to bring the desktop icons back but when I click the start menu it switches from the desktop with icons to the above mentioned screen with no icons. When it is on this new screen you can't right click on anything. A new user works as it should. The customer has no idea what they clicked on. Is there someway to rest any customization's they have done?

I believe your customer has the Tablet Mode turned on.

Bottom right at the system tray, there is a Notification icon next to Time > click it > click Tablet mode.
Desktop should be back on.

Thanks david. I had to turn off tablet mode and that brought the icons back. Then turn off use full start screen under Personalization > Start, so that left click on start menu actually opened the menu.
Hope this helps someone.