Office Apps Crashing

How to Stop Outlook, Teams, and OneDrive from Closing Unexpectedly

Maira Mehtab Sep 21, 2026 869 views

Question details

Users are experiencing random and unexpected closures of key Microsoft applications, specifically Outlook, Microsoft Teams, and OneDrive, disrupting their normal workflow.

Product: Microsoft 365
Device & OS: not provided
Scenario: Working with multiple Microsoft applications simultaneously when they suddenly terminate.
Observed behavior: Outlook, Microsoft Teams, and OneDrive close unexpectedly without warning or error messages during active use.

Before you start

Before proceeding with system repairs, ensure you have saved any open work in other applications and restart your computer to clear any temporary memory conflicts.

Solution 1Recommended

Repair Your Microsoft 365 Installation

Use the Windows built-in repair tool to fix corrupted Microsoft Office files that may be causing the applications to crash.

Running a repair can resolve issues where core Office application files have become corrupted or are missing due to interrupted updates.

Open Windows Settings

Click the Start menu and select 'Settings' (the gear icon), then navigate to the 'Apps' menu and select 'Installed apps' or 'Apps & features'.

Modify Microsoft 365

Scroll down or search to find 'Microsoft 365' (or your specific Office version). Click the three-dot menu next to it and select 'Modify'.

Run Online Repair

Select 'Online Repair' from the prompt window and click 'Repair'. Follow the on-screen instructions to download and replace corrupted files.

Data Safety: Running a repair only resets the application files. Your personal emails, documents, and synced OneDrive files will remain untouched.

Solution 2

Run the Microsoft Support and Recovery Assistant (SaRA)

Use Microsoft's official diagnostic tool to automatically scan, identify, and fix complex app closure issues.

Free Microsoft Office alternative

Try WPS Office for a Stable, Lightweight Experience

If Microsoft Office applications continue to crash or use too many system resources, consider switching to WPS Office. It provides a highly stable, lightweight, and fully compatible alternative for all your document, spreadsheet, and presentation needs.

1. Download the Installer: Visit the official WPS website and click 'Download WPS Office Free' to get the lightweight installation file.
2. Install Quickly: Run the installer. The process takes only a few minutes and uses minimal system resources.
3. Open Your Files: Launch WPS Office and immediately open your existing Word, Excel, and PowerPoint files without any formatting loss.

Highly stable performance that prevents unexpected software closures.Seamless format compatibility with Microsoft Office (.docx, .xlsx, .pptx).All-in-one lightweight suite combining Writer, Spreadsheet, and Presentation.Free to use with a familiar interface for effortless migration.

microsoft office alternative - wps office

Frequently Asked Questions

Why do Outlook and Teams keep closing by themselves?

Unexpected closures are commonly caused by corrupted application files, conflicting third-party add-ins, outdated software versions, or a lack of available system resources (RAM).

Will repairing Microsoft 365 delete my emails or files?

No, running a Quick Repair or Online Repair only replaces or repairs the underlying application files. Your personal data, emails, and OneDrive files are preserved.

What information should I provide to support if the apps keep crashing?

If you need to contact official support, ensure you provide your exact Office version number, Windows OS version, and detailed screenshots of any error messages. Make sure to blur or hide any confidential personal information before sharing.

Can I prevent OneDrive from crashing on startup?

Yes, you can try resetting OneDrive. Press Windows Key + R, type '%localappdata%\Microsoft\OneDrive\onedrive.exe /reset', and press Enter. This will restart the app and resolve many startup crash issues.

Office App Problems