If you try to run a program and receive an error stating that the api-ms-win-crt-runtime-l1-1-0.dll DLL is missing from your computer, you can use this guide to restore the missing DLL so that you program works again.

When programs are created, they are linked to dynamic link libraries (DLLs) that contains code that the program needs to properly work.  If a required DLL is missing, then Windows will display an alert telling you the name of the missing DLL so that you can try and resolve the problem.

If you run a program and receive the following error about api-ms-win-crt-runtime-l1-1-0.dll being missing, you need to install the Visual C++ 2015 Redistributable package using the instructions below.

The program can't start because api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer. Try reinstalling the program to fix this problem/

To fix the api-ms-win-crt-runtime-l1-1-0.dll is missing error in Windows, please follow these steps:

1. Go to the Microsoft Visual C++ 2015 Redistributable page from Microsoft and click on the Download button.
2. You will be brought to page where it asks you to select whether you want to download the 32-bit or 64 bit version of Windows. Select the version you need and click the Next button. If you are unsure what version you need, you can use this tutorial to determine what you need.
3. The file will now download to your computer. Once downloaded, double-click on the downloaded vc_redist.x64.exe file. 
4. The Microsoft Visual C++-2015 Redistributable screen will be displayed and ask you to agree to the license terms and conditions. Put a checkmark in the "I agree" box and then click on the Install button.

   

5. If Windows prompts you to allow the program to make changes or continue, click on the Yes or Allow button.
6. When done, the program will display a message stating that it was successfully installed.

   

7. You can now close the installer.

If you already had the DLL installed and it is still showing as missing, you can download the above Redistributable, but this time perform a repair.

You can now try to run the program that previously gave the error and it should work again.