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How to Fix Microsoft Word Error Code 0x426-0x0 on Windows 11
Question details
Microsoft Word displays an error message containing code 0x426-0x0 and refuses to open documents.
- Product
- Microsoft Word (Microsoft 365)
- Device & OS
- Windows 11
- Scenario
- Opening Microsoft Word documents or launching the Word desktop application.
- Observed behavior
- The application fails to launch and throws error code 0x426-0x0, persisting even after a standard uninstallation and reinstallation of Microsoft 365.
Before making system changes, save any open work in other programs and restart your Windows 11 computer to clear potential temporary software conflicts.
Run a Quick Repair for Microsoft 365
Use the built-in Windows repair tool to quickly replace missing or corrupted Office installation files locally.
The Quick Repair function scans your local Microsoft 365 installation files and replaces corrupted data without requiring an internet connection. This is the fastest way to resolve the 0x426-0x0 error.
Click the Start button on your Windows 11 taskbar and select the Settings gear icon.
Click on 'Apps' in the left-hand menu, then select 'Installed apps' (or 'Apps & Features') from the right pane.
Scroll down the list of installed applications until you find 'Microsoft 365' or 'Microsoft Office'. Click the three-dot menu icon next to it and select 'Modify'.
In the repair dialog that appears, select 'Quick Repair' and click 'Repair'. Follow the on-screen prompts and wait for the process to finish before testing Word again.
Perform an Online Repair and Disable Optimization Software
If Quick Repair fails, download fresh installation files via Online Repair and disable third-party tools that might be deleting Office files.
Avoid Word Error Codes with WPS Office
If Microsoft 365 continues to display error codes like 0x426-0x0, consider switching to WPS Office. It is a highly compatible, free, and lightweight alternative that lets you view, edit, and save Word documents without the complex background services that often cause these errors.
- 1. Download the Installer: Visit the official WPS Office website and click the download button for the free Windows version.
- 2. Install WPS Office: Run the downloaded setup file. The lightweight installation process takes only a few minutes to complete.
- 3. Open Your Documents: Double-click any existing .docx or .doc file to open it seamlessly in WPS Writer and continue your work without interruption.
Frequently Asked Questions
What causes Microsoft Word Error Code 0x426-0x0?
Error code 0x426-0x0 is primarily caused by corrupted Microsoft Office installation files, failure of the Microsoft Office Click-to-Run service, or interference from third-party PC optimization and system cleanup software.
Will repairing Microsoft 365 delete my Word documents?
No, running either a Quick Repair or an Online Repair only fixes the application software files. It will not touch, alter, or delete any of your personal documents, spreadsheets, or presentations.
Why didn't reinstalling Microsoft 365 fix the 0x426-0x0 error?
A standard uninstallation sometimes leaves behind corrupted registry entries or background service configurations. The built-in Online Repair tool is often more effective at thoroughly replacing these damaged components than a manual reinstall.
