Windows Error SxS-Error — Side-by-Side Configuration Error

Windows Side-by-Side Configuration error means the application requires a specific version of a runtime library that is missing or corrupted. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: SideBySide error — assembly dependency failure. Application manifest requests specific DLL versions. Common with C++ applications and games. Event Viewer SideBySide entries show exact missing assembly. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Missing Visual C++ Redistributable package. Corrupted manifest file in the application. Conflicting DLL versions installed. Application built with unsupported runtime version. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Install all Visual C++ Redistributable versions (2005 through latest). Check Event Viewer > Application for SideBySide error details. Reinstall the affected application. Repair Visual C++ installations from Programs and Features. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Windows Error Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.