Hello! My name is Ben a fellow member here in the community, not a Microsoft employee. Hope you are doing well!
With regards to this error that you encountered when launching Word, Excel, or PowerPoint. It is possible that there is a corrupted file in your Microsoft 365 apps. Though the Outlook is working but it would be best to try and do a quick repair via Control Panel as well.
To do this, you may follow the steps:
- Press Windows key and search for Control Panel
- Go to Programs
- Go to Programs and features
- Locate the Microsoft 365 or Office app.
- Click the app and select Change at the top.
- Select Quick repair.
If this doesn't work. You may follow the next step below:
- Press Windows key and search for System Configuration
- Click Services
- Select Hide all Microsoft services.
- Click on Disable all.
- Click Apply > Ok > and restart your device.
After doing the steps above, try to launch Word, Excel and PowerPoint again.
I hope the steps helps. Feel free to let us know how it goes or if there are still problems. We are here to assist.