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How to Fix Microsoft 365 Apps Not Opening After an Update
Question details
Users are unable to launch Microsoft 365 applications, such as Word, Excel, or PowerPoint, after installing a recent software or system update.
- Product
- Microsoft 365
- Device & OS
- Windows
- Scenario
- Attempting to open Microsoft 365 apps right after a system or software update has been applied.
- Observed behavior
- The applications fail to open, crash immediately on launch, or remain entirely unresponsive due to corrupted update files, conflicting system utilities, or incompatible add-ins.
Ensure you have saved all your recent work and restart your computer to see if a simple reboot clears any pending update processes.
Start in Safe Mode and Disable Add-ins
Running Office in Safe Mode bypasses add-ins and startup settings that might conflict with the latest update.
Incompatible add-ins are a common reason for Office apps crashing or failing to launch after an update. Safe Mode allows you to start the application in a basic state so you can isolate the problem.
Press the Windows key + R on your keyboard to open the Run dialog box.
Type 'winword /safe' and press Enter. This will attempt to open Microsoft Word in Safe Mode.
If the application opens successfully, go to File > Options > Add-ins. At the bottom of the window, select 'COM Add-ins' from the Manage drop-down and click Go. Uncheck the add-ins one by one to determine which one is causing the issue.
Perform an Online Repair for Microsoft 365
Use the built-in Windows repair tool to fix damaged Office installation files.
Uninstall Conflicting Third-Party Utilities
Remove third-party system optimization tools like CCleaner that might interfere with Office processes.
Use WPS Office as a Reliable Alternative When Microsoft 365 Fails
If Microsoft 365 continues to experience update errors or fails to launch, WPS Office provides a lightweight, highly compatible, and free alternative to keep you productive without interruptions.
Frequently Asked Questions
Why does Microsoft 365 stop working after a Windows update?
System or software updates can sometimes cause temporary conflicts with Office registry keys, third-party add-ins, or antivirus software, preventing the applications from launching properly.
Will running an Online Repair delete my Word documents or Excel files?
No, running an Online Repair only fixes the installation files and registry entries of the Microsoft 365 applications. Your personal files, documents, and spreadsheets remain completely safe.
How do I know which add-in is preventing Office from opening?
By opening the app in Safe Mode, you bypass all add-ins. You can then enable them one by one in the app's Options menu (File > Options > Add-ins) and restart normally to identify which specific add-in causes the crash.
