Office Apps Crashing

Fix Microsoft 365 Apps Working Incorrectly Error and Closing

Elise WilliamsElise Williams Oct 26, 2026 868 views

Question details

Users are unable to use Microsoft 365 applications because the programs continuously display an error message and close on their own.

How to Fix Microsoft 365 Apps Working Incorrectly Error
Product
Microsoft 365
Device & OS
not provided
Scenario
Attempting to open or work within Microsoft 365 applications such as Word or Excel.
Observed behavior
The applications display a message stating they are working incorrectly, close unexpectedly, and the built-in Repair Now button fails to resolve the issue.
Before you start

Ensure you have your Microsoft account login details handy and a stable internet connection before initiating any application repairs.

Solution 1Recommended

Run a Quick Repair via Windows Settings

Use the Windows system settings to repair the Office installation when the in-app repair button is unresponsive.

The Quick Repair option checks for and replaces missing or corrupted files without requiring an internet connection. It is the fastest way to resolve unexpected application crashes.

1
Access Apps and Features

Right-click the Start menu icon on your desktop and select 'Apps and Features' (or 'Installed apps' depending on your Windows version).

2
Locate Microsoft 365

Scroll through the list of installed programs or use the search bar to find your Microsoft 365 or Microsoft Office installation.

3
Modify the Installation

Click on the Microsoft 365 entry (or the three dots next to it) and select 'Modify'. If prompted by User Account Control, click 'Yes'.

4
Execute Quick Repair

In the repair dialog box, select 'Quick Repair' and then click the 'Repair' button to begin the process. Wait for the repair to complete before opening any Office apps.

Run a Quick Repair via Windows Settings
Data Preservation: Running a Quick Repair will not delete your personal files, Outlook profiles, or custom settings.
Free Microsoft Office alternative

Switch to WPS Office for a Crash-Free Experience

If Microsoft 365 continues to display error messages and crash, consider switching to WPS Office. It provides a highly stable, lightweight environment for creating and editing documents without the hassle of continuous repairs.

  1. 1. Download the Installer: Visit the official WPS Office website and download the free installation file.
  2. 2. Install and Launch: Run the installer and open WPS Office to access Writer, Spreadsheets, and Presentation.
  3. 3. Open Existing Files: Directly open your existing Microsoft Office files; they will render perfectly without any formatting loss.
Highly stable application architecture with fewer unexpected crashesFully compatible with Microsoft Office formats including .docx, .xlsx, and .pptxLightweight installation that consumes minimal system resourcesFamiliar user interface for a seamless and immediate transition
microsoft office alternative - wps office

Frequently Asked Questions

Why does the in-app Repair Now button fail to work?

When the core application files are severely corrupted, the built-in repair tool within the app cannot function properly. In such cases, you must initiate the repair externally through Windows Settings.

Will running an Online Repair delete my Word documents or Excel spreadsheets?

No, neither Quick Repair nor Online Repair will delete your personal documents, data files, or Outlook profiles. They only replace and fix the Microsoft 365 software files.

What is the difference between Quick Repair and Online Repair?

Quick Repair works offline by quickly replacing corrupted system files and fixes most common issues. Online Repair requires an internet connection and performs a complete reinstallation of the Office suite, which is useful for deeper corruption.