I have had this grouble for months and HP and MS could not find problem.
I went in on windows update and when the window open, up in the address box, it says conrol panel, system and maintainence, and windows update. I clicked on control panel. When it opened I CLicked on edit and and when the window opens, I noticed the "undo delete" was highlighted. I clicked on it and everything has been working great since. It worked for me. Hope it works for you.