What is API MS win CRT runtime missing error?

The API MS win CRT runtime missing error is an error message that typically occurs when a computer system is missing a specific DLL file called api-ms-win-crt-runtime-l1-1-0.dll. This DLL file is part of the Microsoft Visual C++ Redistributable package and is required for running various applications on a Windows system. When this DLL file is missing or not found, it can lead to compatibility issues and prevent certain programs from running correctly. Here’s a closer look at the error:

Causes of the error:

  • Missing or corrupted DLL file: The most common cause of the error is the absence of corruption of the api-ms-win-crt-runtime-l1-1-0.dll file on the system.
  • Incompatible or outdated software: Some applications may require a specific version of the Visual C++ Redistributable package, and if the installed version is outdated or incompatible, it can trigger the missing DLL error.
  • System updates or upgrades: Installing system updates or upgrading the operating system can sometimes lead to the removal or misplacement of certain DLL files, causing the error.
  • Error messages and symptoms:
  • api-ms-win-crt-runtime-l1-1-0.dll is missing or The program cannot start because api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer.


  • Application failure to launch or crashes when attempting to run.
  • Solutions to resolve the error:
  • Install/update the Visual C++ Redistributable package: Download and install the appropriate version of the Visual C++ Redistributable package from the official Microsoft website or the software vendor’s site. Ensure that you select the correct version based on your system architecture 32-bit or 64-bit.
  • Repair or reinstall the Visual C++ Redistributable package: If the package is already installed, you can try repairing it through the Programs and Features section in the Control Panel. Locate the Visual C++ Redistributable package, right-click on it, and choose the Repair option. If the repair does not resolve the issue, uninstall the package and reinstall it.
  • Windows Update: Ensure that your operating system is up to date with the latest Windows updates. Run Windows Update and install any available updates, including critical updates and service packs. This can include updates related to the Visual C++ Redistributable package api-ms-win-crt-runtime-l1-1-0.dll.
  • Verify application compatibility: Check if the application causing the error is compatible with your operating system and the installed version of the Visual C++ Redistributable package. Consult the application’s documentation or contact the software vendor for specific compatibility requirements.
  • Perform a clean installation: In some cases, a clean installation of the operating system may be necessary. Back up your important files and consider reinstalling Windows to ensure a fresh and error-free system.

If the error persists despite attempting these solutions, it is recommended to seek assistance from technical support or the software vendor. They can provide specialized guidance and help diagnose and resolve the issue based on your specific system configuration and application requirements.