Sorry, don't what to tell you. I'm using Windows 10

I set up 3 distinct desktops to manage some work.
I moved copies of files, etc.
Everything working fine.
Shut PC down for the night.
When I turned PC on the next day, all of the desktops were...

Is it possible to create multiple and independent desktops?
I clicked on Task View and was able to create several desktops, all exact images of my main desktop.
However, when I deleted some...