Windows 10: White line under the apps and documents disappeared

Hi, I would like to know why is there a white line under the apps Microsoft Store, Spotify, Sticky notes and why did everything documents, pictures, videos, etc disappeared? I opened my laptop yesterday and I saw that everything has been changed and disappeared. The white line was still there since yesterday, what is going on?

:)

 

white line under icons on taskbar

icons on taskbar in windows 10 has a white line under all programs list in it that are open, is there a way of removing it?

 

Opening a new Document, I get two Blank Documents instead of one

@Ztruker

Regarding Mouse Buttons: My Primary Button is the Left Button. Most people use the right button as their primary button. To avoid confusion, I’ll write “Primary Button” or “Non-Primary Button.”

When you click on Start with your Primary Button, a small list appears above the Start Icon; the first Icon is “Power.” Then comes “Settings” “Pictures” and “Documents.” About 4 inches directly above this small list there are “three lines.” Primary-Button-click on those lines, and a long list of the apps that are on your computer will appear. First come the “Most Used.” My first three on “Most Used” are “Word” “Edge” and “Notepad.” Then comes a long list in alphabetical order. For example, under A comes “Alarms and Clocks” and under Y comes “Your Phone.”

Note: If you want to make the list of apps disappear, Primary-Button-Click on the three lines, and the list will disappear.

If you Non-Primary-Button-Click on any of these apps you get a drop-down that reads “Pin to Start” and “More.” Under “More” on the drop-down, is the possibility to “Pin to Taskbar.”

If you Primary-Button-Click on “Pin to Start,” a Tile will appear to the right in the black window. These Tiles can be used for Quick Access. When you “Primary-Button-Click” on the “Word Tile,” a window will appear with several options, the first option is “Blank Document.” Primary-Button-Click on the Blank Document, and a Blank Document will appear on the screen.

If you want to remove a tile from the Black Window, Non-Primary-Button-Click on the app in the long list, and the option to “Unpin from Start” will appear. Primary-Button-Click on the “Unpin from Start” and that Tile will disappear.

You can move the Tiles around by using "Drag and Drop."

 

The 'Photos' app for photo viewing has disappeared.

I do not understand this, when I returned to the PC later today my original settings had returned to the start screen, including one other tile which I had also lost but had not yet re-instated. Also the original list of 'All apps' had returned to the start
screen, including 'Photos'. There is nothing that I am aware of having done that should have caused the original disappearance of some apps from the 'All apps' list and their associated tiles, or that could have caused them to return.

It has therefore been unnecessary to follow your suggested steps, though I have done so anyway and it works as suggested. Note that I had followed your steps 1 & 2 earlier which is why I knew 'Photos' had not disappeared from the PC but was simply not
visible on the 'All apps' list and hence my inability to re-pin the tile.

Thank you for your reply and understanding my frustration.