Microsoft Word 2010 saves your documents periodically while you work on them. If you accidentally save over your document with incorrect information, you can find earlier auto-saved versions of the document and restore the one you need. This feature is also helpful if you close your file without saving, as you can look up an auto-saved version to restore.
Open the file that needs to be restored.
Click on the "File" tab at the top of the Microsoft Word tool bar.
Click "Info," then choose "Versions." Click on each the files listed until you find the desired version.
Click the "Restore" button at the top of the document, located just beneath the standard tool bar.
Select "OK" to overwrite your document with the information from the previous version you selected.
If the auto-recovery feature is not working, click on the "Office" button at the top left corner of your Word tool bar. Choose "Open." Select "All Files," and look for your document with the ".wbk" extension. Click on the file to open it, the save it under the correct name and extension. This process opens a Word Backup File, if one is available.