Windows 10: Windows 10 files disapeared

I upgraded to windows 10 from 7 on April 21st on my Toshiba Satellite computer. Since then I have downloaded photos from my iPhone and created new word documents using windows 10. This morning I open my computer and the desktop has gone back to windows 7 with all my old icons. But my computer is still operating windows 10 as the blue tiles are there in the left corner of my screen, Cortana etc. I just cannot find any of the new files that I created with windows 10!! I have searched everywhere, I have even called Best Buy Geek Squad and they have no clue. Can anyone please help? I need these files back, they are priceless photos of my kids*Sad

:)

 

Update for Microsoft Visual Studio 2010 Tools for Office Runtime (KB3001652) - Error 0x80070643

In my Windows 10, Abdul Malik's answer was not working.

Finally, Marco's answer saves me.

Download the file at below link and install, reboot.

Error disapears then.

Download Visual Studio 2010 Tools for Office Runtime from Official Microsoft Download Center

 

About activation I have some issues I think...

I understand so in time the windows 10 pro insider prewiew evaluation copy.build 10532 will disapear and my windows will still be activated?

 

It sounds like your local profile did not load properly and computer restarted with temp profile (which too quickly displays a notification that all files and changes will be lost when signed out). Hopefully, you did the downloads from your iPhone to your admin profile with the normal desktop. Try this - Click Start/Sign out or Switch User. Find your normal admin account and sign in. Your desktop should replace the minimal desktop.

In the future, I would NEVER place files on my desktop. I would put them in a This PC folder like Music, Pictures, Documents, etc and place shortcuts to the folders or files, NEVER the actual file, in case something like this pops up. I have had it happen to me occasionally with a failed program or update install where I find my normal desktop has changed.

Also, if the files are 'priceless' they should be IMMEDIATELY backed up to a usb stick, ext hard drive or a cloud, like OneDrive or Dropbox. Good Luck.