I am having this problem for the second time now. This happened back in June after a Windows Update. It happened again after the latest Windows Update. The problem seems to be something in the Windows Update.
Last time I fixed in by correcting an invalid entry that was caused by the update, in the registry. I got this fix suggested from a forum on another website. This time I am not finding a fix at all for this, other than reinstalling Windows which works, but then does the same thing again after running the latest Windows Update.