If you get this message in a box on screen here is away to restore normal operation.
1. Click on desktop and select new folder
2.Open new folder
3. click on file top left corner.
4.In drop down menu click command prompt and open as admin.
5.enter sfc/scannow
6. when scan complete,switch off computer and restart.

You may have to do this a couple of times but it does work, I have used this on 2 PC's in the last month it is apparently a known windows10 bug.

Good luck to all I hope this will save you calling your pet PC tech and having a bill for £30-50 to fix a easy problem.

I have had this message a few times, usually during or after an update. I had not heard of the above solution, what I have been doing is forcing a shut down, (I know!!!! ). Once restarted, everything is fine, but thanks for the tip. Incidentlly, when the computer is running okay again, do you delete the folder   

  I forgot to add remove new folder unless you have a use for it.