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Fix Microsoft 365 Apps Repeatedly Crashing and Requesting Repair
Question details
The user needs to resolve an issue where Microsoft 365 applications continuously crash, display a repair prompt, and sometimes fail to complete the repair process.
- Product
- Microsoft 365
- Device & OS
- Windows
- Scenario
- Opening or working within Microsoft 365 applications such as Outlook, Excel, or OneNote.
- Observed behavior
- Applications crash repeatedly and show a repair prompt. Attempting an Online Repair may fail with 'Something went wrong. Error Code: 30015-11 (3221356598)'.
Ensure you have your Microsoft account login credentials handy and a stable internet connection, as repairing or reinstalling Office requires downloading fresh installation files from Microsoft's servers.
Perform an Online Repair via Windows Settings
Running an Online Repair replaces damaged Office installation files by performing a complete click-to-run reinstall, which is more thorough than a Quick Repair.
A Quick Repair only attempts to fix local files without internet access. If your apps are repeatedly crashing, an Online Repair is necessary to download clean application files and resolve deep-seated corruption.
Click the Windows Start menu and navigate to Settings > Apps > Installed apps.
Scroll down to find Microsoft Office or Microsoft 365 in the list. Click the three-dot icon next to it and select Modify.
Select the 'Online Repair' option in the dialog box, then click the Repair button to confirm.
Wait for the repair process to finish downloading and installing the files, then restart your computer before opening any Office apps.
Completely Uninstall and Reinstall Microsoft 365
If the Online Repair fails with Error Code 30015-11 (3221356598), the installation is too corrupted to repair and requires a clean reinstall.
Switch to a Stable, Crash-Free Office Suite
If Microsoft 365 continues to crash or fails to repair correctly, consider switching to WPS Office. It provides a free, highly stable, and lightweight alternative with a familiar interface, ensuring your workflow remains uninterrupted.
- 1. Download the Installer: Visit the WPS Office website and download the free installation file for Windows.
- 2. Install the Software: Run the installer. The lightweight package installs quickly without draining system resources.
- 3. Open Your Documents: Launch WPS Office and directly open your existing Word, Excel, and PowerPoint files without any formatting loss.
Frequently Asked Questions
What causes Microsoft 365 apps to crash and ask for repairs repeatedly?
Repeated crashes are most often caused by corrupted Office installation files, conflicting third-party add-ins, outdated Windows system components, or disrupted updates.
What does Error Code 30015-11 (3221356598) mean during an Online Repair?
This error code indicates that the click-to-run installation service encountered a critical failure. This usually happens due to deeply corrupted registry keys, an interrupted network connection, or interference from antivirus software, requiring a complete uninstallation.
Is there a difference between Quick Repair and Online Repair?
Yes. Quick Repair replaces corrupted files locally without needing an internet connection, making it faster but less thorough. Online Repair completely uninstalls the suite and downloads fresh installation files directly from Microsoft's servers.
