my word is not working for a month now without any reason

Use this order for Word closing with an error after a few minutes:

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
   • Press Windows + R.
   • Type winword /safe and press Enter.
   • If Word opens in Safe Mode, go to File > Options > Add-Ins.
   • In Manage, select the add-in type and choose Go.
   • Clear one add-in at a time, select OK, then restart Word normally.
   • Older add-ins such as ABBYY FineReader and Dragon Naturally Speaking are known to cause problems.
   • If Word does not start in Safe Mode, the issue is likely not an add-in.
3. Run an Office repair
   • Try a Quick Repair first.
   • If that does not fix it, run Online Repair. This is more thorough.
   • In Windows, open Settings > Apps.
   • Find Microsoft Office or Microsoft 365.
   • Select it, then choose Modify > Online Repair.
   • Note: Online Repair is more thorough and may effectively reinstall Office.
4. Install Windows updates and update device drivers
   • Go to Settings > Windows Update and select Check for updates.
   • Install available updates.
   • If the issue continues, update drivers for the video card, printer, mouse, and keyboard.
   • On laptops, also check the laptop manufacturer’s site for updated drivers.
5. If Word still closes unexpectedly when working with cloud files
   • There was a known issue in Office Version 2205 where Word, Excel, and PowerPoint could close unexpectedly when opening, saving, uploading, or downloading cloud documents.
   • The fix was released in Version 2206 (Build 16.0.15330.20230).
   • Install the latest Office updates using File > Account > Update Options > Update Now.
6. If nothing helps, uninstall and reinstall Office
   • Use the Office uninstall troubleshooter.
   • Restart the PC after uninstalling.
   • Reinstall Office.

If the problem is only in Word, an additional troubleshooting step is to start Word with winword /a. If Word works with that switch, the issue can be related to add-ins or Word settings.

Warning: Advanced Word-only fixes in the registry exist, but they reset Word settings and can cause serious problems if done incorrectly. Back up the registry first before using any registry method.

References:

• I get a "stopped working" error when I start Office applications on my PC | Microsoft Support
• How to troubleshoot problems that occur when you start or use Word | Microsoft Support
• Word, Excel, and PowerPoint close unexpectedly when trying to open cloud documents in Office Version 2205 | Microsoft Support
• Word is not working. - Microsoft Q&A
• we are sorry, but word has run into an error that is preventing it from working correctly. Word will need to be closed as a result. Would you like us to repair now? - Microsoft Q&A
• Word not opening - Microsoft Q&A
• When I open an office document, I am getting an error message, I do select repair now and the document will open. But then closes on its own within 5 minutes. Document will save when it is open but it does not seem to be repairing as this is recurring - Microsoft Q&A