my excel is not working it is facing some error and it is not open.

Start Excel in Safe Mode to bypass add-ins and startup settings; if it still will not open, repair the Microsoft 365 or Office installation.

1. Test Excel in Safe Mode

1. Press Windows key + R.
2. Enter the following command, including the space before /safe:

excel /safe

3. Select OK or press Enter.
4. Check whether the title bar says Microsoft Excel (Safe Mode).

Safe Mode bypasses Excel add-ins, most COM add-ins, startup folders, and certain customized settings. ^1^

If Excel opens in Safe Mode:

1. Select File → Options → Add-ins.
2. At the bottom, select COM Add-ins under Manage, then select Go.
3. Clear all checkboxes and select OK.
4. Close Excel and open it normally.
5. If Excel now works, enable the add-ins individually, restarting Excel after each one, to identify the problematic add-in.

If necessary, repeat this process by selecting Excel Add-ins under Manage. Microsoft documents add-in conflicts as a possible cause of Office startup failures. ^2^

2. Repair Office if Safe Mode does not open

Repair affects the entire Office suite, even when only Excel is failing.

Windows 11

1. Close all Office applications.
2. Right-click Start → Installed apps.
3. Find Microsoft 365 or Microsoft Office.
4. Select the three dots → Modify.
5. Select Quick Repair → Repair.
6. Restart the computer and test Excel.

Windows 10

1. Close all Office applications.
2. Right-click Start → Apps and Features.
3. Select Microsoft 365 or Microsoft Office → Modify.
4. Select Quick Repair → Repair.
5. Restart the computer and test Excel.

If Quick Repair does not resolve it, return to the same location and select Online Repair → Repair. Online Repair is more comprehensive and requires an Internet connection; follow the prompts through completion. ^3^

3. Install updates if Excel still fails

If another Office application such as Word opens:

1. Open Word.
2. Select File → Account.
3. Under Product Information, select Update Options → Update Now.
4. Install available updates, restart Windows, and test Excel.

Also open Settings → Windows Update → Check for updates, install available Windows updates, and restart. Microsoft lists Office updates and incompatible device drivers among the next checks for Office startup failures. ^2^

4. Last fallback

If Safe Mode, Online Repair, and updates do not help, uninstall and reinstall Microsoft 365 or Office. Before uninstalling, ensure that the Microsoft account used to purchase or activate Office is available, because it may be needed to reinstall and activate it. Microsoft’s startup-failure procedure places uninstall/reinstall after repair and update checks. ^2^

References

1. Excel not responding, hangs, freezes or stops working
2. I get a "stopped working" error when I start Office applications on my PC | Microsoft Support
3. Repair an Office application