When you try to open an Excel workbook, a Word document or a PowerPoint presentation with Excel, Word, or PowerPoint 2016 the following may occur:
The file doesn’t open in the expected application. For instance, an Excel workbook doesn’t open in Excel 2016; instead, it opens in another app.
An error indicating a file association problem may occur. For instance, you may get an error similar to “This file does not have a program associated with it…”
Also, in some cases, manually re-associating the file type may not work as the Office program may not appear as an option.
Run a Quick Repair to fix the file association problem
In Control Panel, choose Programs > Programs and Features.
Next, select the Office product you want to repair and then choose Change.
Choose the Quick Repair option and then choose Repair.
For more information about the repair option in Office, go to Repair an Office application.