I have solved this problem, see my post here:
http://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/how-to-fix-100-disk-usage-in-windows-10/7c5c979b-0ed0-4855-b9b8-05b9499533e2?tm=1439732422386
I hope this helps you all.
In case people do not want to click on the link, here is...