No software windows appear

Hi,
I recently have reset my computer. For a day or two, I could use it correctly but it's now impossible. No software appear. The icons in the taskbar and the taskbar itself appear, my mouse appear, my startup menu appear but if I open something, anything (I tried Edge, Chrome, Steam, Settings, NVidia's configuration panel, even the ctrl+alt+delete page) nothing shows up. The system seems to open because they appear in the taskbar and the small visualisation window works fine but I have no other image, only the default wallpaper.

Someone knows what I could do with that?

Thanks for the help!
P.s. I use my Surface to write this message or there is no way I could
(I am french, sorry for the imperfect english)

Hi,
altough this tutorial didn't work, it made me realize that my mouse was going over the edge of the screen. Unplogging and re-plogging the monitor repaired it, albeit temporarily. I guesse my computer doesn't detect my monitor properly for some reason. Il try to find the right setting or driver to make it work.
Thank you very much!
Jonathan