A family of Microsoft word processing software products for creating web, email, and print documents.
The Microsoft Store app is not the same as the full desktop Office 2013 installation. The context identifies the Store app labeled Microsoft 365 Copilot as the unified mobile app, not a full Windows version of Office.
To get Word working again, run a full repair of the installed Office desktop product:
- Close all Office apps.
- Open Settings.
- Go to Apps.
- Find Microsoft Office in the installed apps list.
- Select it, then choose Modify.
- Select Online Repair.
- Quick Repair is faster, but it only detects and replaces corrupted files.
- Online Repair is the option that makes sure everything gets fixed.
- Complete the repair prompts.
If the installed desktop product is Office 2013, that is the version to repair. The context also notes that Office 2013 may or may not offer the Online Repair option, but it can be tried.
If the goal is to use the older desktop Word again, use the repaired Office 2013 installation rather than the Microsoft Store app.