From this post, you can get a useful way to repair corrupted Word(.docx), Excel(.xlsx), PowerPoint(.pptx) files, which is using iSunshare Office Repair Genius — a multifunctional Office file repair tool that can resolve the office corruptions and recover the file content for you.
Before running iSunshare Office Repair Genius, please power off the following MS programs: Word, Excel and PowerPoint.
In the Select the file section, click Open button.
Choose the damaged Office file whose format is .docx/xlsx/pptx and hit Open button to input it into the Office file repair tool.
After that, the office file will be added and repaired automatically. Meanwhile, the progress will be shown on the bar.
When the Office file is restored, you can see a tips box as follows.
The repaired Office file will be saved as a new one. To view and use the recovered data, you need to save it at first.
Click Save button at the end of the Save the file option.
Locate to the place where you want to save the recovered Office file and hit Save button.
Then, the repaired Office file will be sent to the selected destination.
Now, you can open the saved file for a check.
Get Office Repair Genius full version to repair the corrupted Office file with .docx / xlsx / pptx extension.