how to fix Microsoft 365 error

To fix issues with Microsoft 365 Excel, especially if you're encountering errors, you can try the following methods:

Method 1: Ignore DDE

1. Open Excel and select File > Options.
2. Go to the Advanced section and scroll down to the General area.
3. Clear the Ignore other applications that use Dynamic Data Exchange (DDE) check box.
4. Click OK.

Method 2: Repair User Experience Virtualization (UE-V)

If you're using UE-V, ensure you have the latest updates installed. You might need to install Hotfix Package 1 for Microsoft User Experience Virtualization 2.0 (KB2927019).

Method 3: Reset File Associations

Reset the Excel file associations to their default settings:

• For Windows 10, right-click an Excel workbook, select Open with, then More apps, and choose the version of Excel you want to use.

Method 4: Repair Office

You can also try repairing your Office installation:

• For Windows 10:
  1. Open Control Panel.
  2. Click Uninstall a program under Programs.
  3. Select Microsoft 365 and click Change.
  4. Choose Online Repair and follow the prompts.

Make sure to restart your computer after the repair process is completed if prompted.

Hi,

Thanks for reaching out and explaining what’s happening. Could you confirm something for me, when Excel shows the error, does it crash completely, refuse to open, or only affect certain files? And are your important documents saved on your computer or in OneDrive?

This will help me understand if it’s a startup issue or something specific to your files, and where we should focus for recovery.

In the meantime, here’s what you can try. First, open Excel in Safe Mode by pressing Windows + R, typing excel /safe, and hitting Enter. If it works, the problem is likely caused by add-ins, so you can disable them in File > Options > Add-ins.

Next, make sure Microsoft 365 is up to date by going to File > Account > Update Options > Update Now. If that doesn’t help, repair Office through Control Panel > Programs and Features, select Microsoft 365, click Change, and choose either Quick Repair or Online Repair.

If you lost unsaved work, check File > Info > Manage Workbook > Recover Unsaved Workbooks, or look for the Document Recovery pane when Excel restarts. If your files are on OneDrive or SharePoint, you can use Version History to restore previous versions.

Finally, enable AutoSave and AutoRecover to avoid future data loss. If nothing works, reinstall Microsoft 365 from your account portal.

Let me know if this helps or if you need more guidance, I’m here to help!

Warm regards,

Edward