If Word opens the document but does not allow editing, the most likely causes are that Office is not activated, the wrong account is signed in, the file is read-only, or the file is locked by another user.
Try these steps in order:
- In Word, go to File > Account and check the signed-in account.
- If the wrong Microsoft account is shown, sign out and sign back in with the account that owns the Office purchase or Microsoft 365 subscription.
- Check whether Office is activated.
- If Word shows Unlicensed Product or an activation error, sign in with the correct account.
- The Office product or Microsoft 365 subscription should appear under Services & subscriptions.
- If multiple Office versions are installed, remove the one not being used.
- In Windows, open Control Panel > Programs > Programs and Features.
- Search for office.
- If more than one version appears, uninstall the version not being used, restart the computer, then open Word and sign in again.
- If activation still fails, run an Online Repair.
- The documented next step after removing extra Office versions is to run an online repair of Office.
- If the document opens in read-only mode in Word for the web, select Edit Document > Edit.
- If editing is not allowed, create a copy with File > Create a Copy and edit the new file, or ask the owner to enable editing.
- If the file is stored on OneDrive, check available storage.
- If OneDrive storage is full, the document cannot be saved until storage is available again.
- If the file is shared, it may be locked by another user.
- If someone has the file open in the desktop app, only the last saved version can be viewed until they close it.
- To work immediately, use File > Save As to create a new copy and edit that copy.
- If Word says the file is locked because it is already open, close Word and restart the computer.
- This can clear a temporary lock left after a crash.
- If the file is on SharePoint, check whether it is checked out.
- In the SharePoint document library, point to the file to see whether another person has it checked out.
- If the file still cannot be edited, check whether the file owner gave edit permission.
- Without edit permission, coauthoring and editing are not available.