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How to Fix Microsoft 365 Apps Crashing After Startup on Windows 11
Question details
The user needs to stop Microsoft 365 applications from abruptly closing and displaying errors right after launch.
- Product
- Microsoft 365
- Device & OS
- Windows 11
- Scenario
- Launching Office applications to create or edit documents.
- Observed behavior
- Applications display an error shortly after launching, attempt an automatic repair, and then unexpectedly close, causing unsaved work to be lost despite having an active license.
Ensure you have a stable internet connection, as the complete online repair process needs to download fresh installation files from Microsoft's servers to replace corrupted data.
Perform a Complete Online Repair from Windows Settings
Running a thorough Online Repair resolves deep file corruption that a standard quick repair or a simple reinstallation cannot fix.
When Microsoft 365 gets caught in a 'Repair Now' error loop, the local application cache is likely severely corrupted. The Online Repair tool connects directly to Microsoft servers to securely replace all installation files while preserving your personal settings.
Press the Windows key + I on your keyboard to launch the Windows 11 Settings app.
Click on 'Apps' in the left-hand sidebar menu, then select 'Installed apps' to load the list of software installed on your computer.
Scroll down or use the search bar to locate 'Microsoft 365' or 'Office'. Click the three horizontal dots (...) next to it and select 'Modify' from the dropdown menu.
When the repair dialog box appears, select the 'Online Repair' option (do not choose Quick Repair), and then click the 'Repair' button.
Once the repair process has finished downloading and installing the fresh files, restart your PC before attempting to open any Microsoft 365 applications.
Switch to WPS Office for a Stable and Lightweight Experience
If Microsoft 365 continues to crash on Windows 11 or you want to avoid lengthy software repairs, WPS Office provides a fast, stable, and highly compatible alternative. It handles your documents effortlessly without the heavy system resource usage that often leads to application failures.
- 1. Download the Installer: Visit the official WPS Office website and click the free download button for Windows.
- 2. Install on Your PC: Run the downloaded setup file and follow the quick on-screen instructions to install the suite.
- 3. Open Your Office Files: Double-click your existing Microsoft documents, spreadsheets, or presentations to open and edit them seamlessly in WPS Office.
Frequently Asked Questions
Why does Microsoft 365 keep crashing after startup on Windows 11?
This problem typically occurs due to corrupted installation files, outdated registry keys, conflicting third-party add-ins, or an incomplete Windows update that disrupts Office background services.
What is the difference between Quick Repair and Online Repair?
Quick Repair attempts to fix problems quickly using files already cached on your hard drive, which is often insufficient for severe crashes. Online Repair performs a clean, comprehensive download and reinstallation of the software from Microsoft servers.
Will running an Online Repair delete my saved files?
No. Running an Online Repair only resets and replaces the application files (like Word.exe or Excel.exe). Your personal documents, spreadsheets, presentations, and Outlook data files remain completely untouched.
How do I bypass the 'Repair Now' prompt if it doesn't work?
If clicking the 'Repair Now' button inside the error popup simply closes the app without fixing it, ignore the popup. Instead, close the application completely and run the Online Repair directly through the Windows 11 'Installed apps' menu in Settings.
