By default, Microsoft Word is “smart” enough to try automatic recovery of the document (in case of a rowdy close-down, i. e. close-down without the user’s permission).
Open the office application in which you were working with the unsaved file. Then select the File menu.
On the Information page, click on Manage Document and select Recover Unsaved Document through the drop-down menu. This menus also gives you the option in order to delete all unsaved documents. I can send you a link to how I restored