Microsoft 365 Error Codes

How to Troubleshoot Microsoft 365 Copilot Error Code 10

Maira Mehtab Sep 22, 2026 869 views

Question details

Users need to know how to diagnose and collect the necessary information when Microsoft 365 applications fail to load due to Copilot-related error code 10.

Product: Microsoft 365 and Copilot
Device & OS: not provided
Scenario: Microsoft 365 applications fail to load and display error code 10 related to Copilot.
Observed behavior: The Microsoft 365 application crashes or fails to launch, displaying an uncommon Copilot Error Code 10 prompt.

Before you start

Before attempting any complex system repairs, ensure you take a clear screenshot of the exact error message and verify whether the issue happens across all Microsoft 365 applications or just one.

Solution 1Recommended

Gather Diagnostic Information and Perform Office Repair

Since Error Code 10 is an uncommon Copilot issue, gathering specific account and version details is essential for support before you attempt standard Office repair methods.

Error Code 10 can have several underlying causes, ranging from account synchronization failures to corrupted Office application files. Having precise diagnostic details ensures faster resolution when dealing with technical support.

Document the Exact Error Message

Take a screenshot of the exact Error Code 10 prompt. Note down the specific Copilot product you are using and your account type (e.g., Business, Enterprise, or Personal).

Find Your Office Version

If you can open at least one Office application, go to 'File' > 'Account' to locate your exact Office version and build number under the Product Information section.

Identify Affected Applications

Test different Microsoft 365 applications like Word, Excel, and PowerPoint to see if the failure to load is isolated to one app or affects the entire productivity suite.

Attempt a Quick Repair

Navigate to Windows Settings > Apps > Installed apps. Locate Microsoft 365, click the three dots, select 'Modify', and choose 'Quick Repair'. If you contact support later, be sure to inform them whether this repair, a reset, or a full reinstallation was attempted.

Support Request Tip: Always include your compiled screenshots, Office version, and repair attempt history when submitting a ticket to Microsoft Support for Error Code 10.

Free Microsoft Office alternative

Use WPS Office to Keep Working Uninterrupted

If Microsoft 365 is failing to load due to Error Code 10, you can use WPS Office to open, edit, and save your documents without delay. WPS Office is a free, lightweight, and highly compatible alternative that lets you seamlessly transition your work while you troubleshoot Microsoft issues.

1. Download and Install WPS: Visit the official WPS website to download the free installation package and complete the quick setup.
2. Open Your Documents: Launch WPS Office and simply drag and drop your existing Word, Excel, or PowerPoint files directly into the workspace.
3. Resume Your Work: Edit your files seamlessly using the familiar interface and save them in their original Microsoft formats.

Fully compatible with Microsoft Office formats including .docx, .xlsx, and .pptx.Lightweight design ensures quick loading even on older devices.Free to use with a familiar user interface that requires no learning curve.Integrated AI capabilities to assist with your daily document creation and analysis.

microsoft office alternative - wps office

Frequently Asked Questions

What does Microsoft 365 Error Code 10 mean?

Error Code 10 in Microsoft 365 usually relates to a failure in loading Copilot services or application components. It is an uncommon error that can stem from account sync issues, version mismatches, or corrupted installation files.

Where can I find my exact Microsoft Office version?

You can find your Office version by opening any working Microsoft 365 application, clicking on 'File' in the top left corner, and selecting 'Account' from the menu. The exact version and build number will be listed under the 'Product Information' section.

Will repairing Microsoft 365 delete my files?

No, using the built-in Quick Repair or Online Repair tools for Microsoft 365 only fixes the application files and registry keys. Your personal documents, spreadsheets, and presentations saved locally or on OneDrive will remain completely unaffected.

Microsoft Office Error Codes