Follow these steps to get PowerPoint (and the other Office apps) working again when the “Unable to start Microsoft 365 and Office – Error Code: 147‑0” message appears:
- Close all Office apps
- Close PowerPoint, Word, Excel, Outlook, and the error dialog.
- Run a full Online Repair of Office
- Open Control Panel.
- Go to Uninstall a program (or Programs and Features).
- Select Microsoft 365 Apps / Microsoft Office in the list.
- Choose Change.
- Select Online Repair (not Quick Repair), then start the repair and let it finish.
- When it completes, restart Windows.
- Try PowerPoint again
- After restart, open PowerPoint from the Start menu and test creating/opening a file.
If Office still will not start after the Online Repair, repeat step 2 to run another Online Repair, or completely uninstall Microsoft 365 from Control Panel → Uninstall a program, restart, and then reinstall Microsoft 365 from the account portal.
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