All of my inbox messages suddenly went to the Delete folder.  Is there any filter or account options that caused this to happen?

The delete of folders should be a easy function....  HOWEVER,  When I select a folder in outlook.com and select Delete folder. -

It deletes the folder for a couple seconds...  then the folder reappears and a message comes up on the top of the screen:  Folder could not be deleted.

What is happening....   ?  Why?   is there an online program bug?  What can I do... short of closing the account to fix this?  which I don't want to do....

I am using a Microsoft Surface Pro tablet with Windows 8 Professional....  This is a full blown computer.....

Outlook for MS Office 2011 for Mac

Why my Hotmail constantly deletes my emails (new or old) from Inbox folder and puts them in Delete folder?