- Go to “Control Panel”. Select “Programs”.
- Click on “Uninstall a program”.
- Now, right click on “Microsoft office 365” and select on “Change”.
- Click repair button. And close all windows.
- Open Microsoft Outlook 2013 and go to “File” -> “Options”.
- Select options menu.
- Select “Trust Center” and click on “Trust Center Settings”.
- Go to “Attachment Handling” and click on “Attachment and Document Previewers”.
- On the drop down, uncheck “Microsoft Excel Previewer” and then click “OK” button.
- Click on “OK” again and move out of the options to the main screen.