If you are trying to launch a program or game and are greeted by an error message stating that is missing, you aren't alone. This specific file is a component of the Universal C Runtime (CRT) , which is essential for running applications built using Visual Studio 2015 or later.
If you are seeing an error that this file is missing, you should api-ms-win-crt-synch-l1-2-0.dll download
This DLL (Dynamic Link Library) file is part of the . It handles synchronization functions within applications. When an app is coded to use these modern libraries but cannot find them on your system, it fails to start. This most commonly occurs on older versions of Windows like Windows 7 , Windows 8.1 , or Windows 10 versions that haven't been updated in a long time. If you are trying to launch a program
| ❌ Don't Do This | ✅ Do This | | :--- | :--- | | Download the .dll from a random website | Run Windows Update | | Copy the file from another PC | Repair Visual C++ Redistributable | | Ignore security warnings | Install KB2999226 (Windows 7 only) | It handles synchronization functions within applications
To summarize: You need to repair your Visual C++ Runtime Environment.