A Windows Update ran at 2am. By morning, our .NET app was dead.

📰 Medium · Programming

Learn how a Windows Update can unexpectedly break a .NET app without any code changes or deployments and what you can do to troubleshoot and prevent such issues

intermediate Published 19 Apr 2026

Action Steps

Investigate Windows Update history to identify potential causes
Check event logs for errors related to the Windows Update
Run dependency checks to ensure all dependencies are compatible with the updated Windows version
Test the application in a staging environment before deploying to production
Configure monitoring and alerting to detect similar issues in the future

Who Needs to Know This

Developers, DevOps engineers, and system administrators can benefit from understanding the potential impact of Windows Updates on .NET applications and how to mitigate these risks

Key Insight

💡 Windows Updates can have unintended consequences on .NET applications, even without code changes or deployments