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How to Fix Excel Error 0xC000142 During Microsoft 365 Update
Question details
The user is unable to launch Excel and encounters an application initialization error code 0xC000142 tied to a pending software update.
- Product
- Microsoft Excel / Microsoft 365
- Device & OS
- not provided
- Scenario
- Attempting to launch Excel while Microsoft 365 and Office are undergoing a background update.
- Observed behavior
- Excel fails to start, briefly displays a message indicating that Microsoft 365 and Office are updating, and then shows an error prompt stating it cannot access error OXC000142.
Ensure you have saved all your work and closed any other open Office applications (such as Word or PowerPoint), as the repair process will need to restart background Office services.
Perform an Office Quick Repair and Complete the Manual Update
This is the recommended method to resolve corrupted update files or hung background processes causing the 0xC000142 error without requiring a full reinstallation.
The error 0xC000142 typically indicates that the application failed to initialize properly, often due to an interrupted or stalled Microsoft 365 background update. Running a Quick Repair resets these core files so the update can complete normally.
Reboot your system to clear any stuck background update processes and ensure a clean environment before running the repair tool.
Right-click the Windows Start button and select 'Apps and Features' (or 'Installed apps' if you are using Windows 11).
Scroll down the list to find 'Microsoft 365' or 'Microsoft Office'. Click on it, select 'Modify', choose 'Quick Repair', and follow the on-screen instructions to let Windows fix the core files.
Once the repair is finished, open any Office application like Excel. Go to File > Account, click on 'Update Options', and select 'Update Now' to properly finish the Microsoft 365 update.
Switch to WPS Office to Avoid Update Interruptions
If Microsoft 365 update errors like 0xC000142 are frequently slowing down your workflow, consider switching to WPS Office. It is a free, lightweight, and highly compatible alternative that lets you edit your spreadsheets without frustrating forced background update loops.
- 1. Download the installer: Visit the official WPS website and download the free WPS Office installer.
- 2. Install the software: Run the installer to quickly set up the lightweight office suite on your PC.
- 3. Open your files directly: Launch WPS Spreadsheet and open your existing .xlsx files to resume your work instantly.
Frequently Asked Questions
What does application error 0xC000142 mean in Excel?
Error 0xC000142 means that the application failed to initialize properly. In the context of Excel, this usually happens when core program files are in use, locked, or corrupted by a pending or stalled Microsoft 365 background update.
Will performing an Office Quick Repair delete my files?
No, performing a Quick Repair or an Online Repair from the Windows Apps and Features menu only scans and repairs the Microsoft Office application files. Your personal documents, spreadsheets, and data will remain completely untouched.
How do I prevent Microsoft 365 from getting stuck on updates?
While Microsoft 365 updates automatically by default, you can prevent them from getting stuck by avoiding abruptly turning off your PC while updates are running. Periodically checking for updates manually via File > Account > Update Options > Update Now can also help ensure they install smoothly.
