word file is not opening,showing error

Try these steps in order:

1. Update Office
   • Open any Office app.
   • Go to File > Account.
   • Under Product Information, select Update Options > Update Now.
   • If Update Now is not shown, select Enable Updates first.
2. Start Word in Safe Mode to check add-ins
   • Select Search, type run, and open Run.
   • Type winword /a and press Enter.
   • This starts Word without add-ins and global templates.
   • If Word opens this way, the issue is likely related to add-ins or templates.
3. Run an Online Repair of Office
   • In Windows, go to Settings > Apps > Installed apps.
   • Find Microsoft Office.
   • Select the three-dot menu > Modify.
   • Choose Online Repair, then select Repair.
   • Note: Online Repair reinstalls Office components.
4. Check Windows Update for driver and system updates
   • In Windows 11, go to Start > type settings > Windows Update.
   • Select Check for updates.
   • Install any available updates.

If Word opens but a specific document does not, try:

5. Open and Repair the document
   • In Word, select File > Open > Browse.
   • Select the file.
   • Select the arrow next to Open > Open and Repair.
6. Insert the document into a new blank file
   • In Word, select File > New > Blank Document.
   • On the Insert tab, select Object > Text from File.
   • Select the affected file, then select Insert.

References:

• I get a "stopped working" error when I start Office applications on my PC
• How to troubleshoot problems that occur when you start or use Word
• Open a document after a file corruption error