How To Fix ‘API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL’ is Missing Error

The API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is missing error often faced by the Windows users. The system having this problem cannot access or open the program.

Most of the users face this problem, so they solve it either by replacing it with the local file, installing the older version of the Program, installing the universal C runtime update, etc.

And these methods are mention below along with the steps specified in the so the user can follow the steps and get rid of the problem quickly.

api-ms-win-crt-runtime-l1-1-0.dll is Missing Error

Moreover, it’s essential to solve the problem because without solving this issue the program can’t start because API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is missing from the computer. Windows operating system, with its vast array of features, relies heavily on Dynamic Link Libraries (DLL) to run programs smoothly.

Among these DLL files, one that often raises questions is the “API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL.” In this article, we’re diving deep into the role of this DLL, the common issue of it going missing, and the distinction between Windows API and DLL.


API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is a part of the Microsoft Visual C++ Redistributable for Visual Studio and is tied to the Universal CRT (C Runtime). It’s crucial for running several applications, primarily those built using a particular version of Visual Studio.

Causes of “API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is Missing” Error

The “API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is Missing” error can emerge from:

  • Incomplete Installation: If the Microsoft Visual C++ Redistributable package isn’t correctly installed, this error might appear.
  • Corrupt DLL File: Malware or hard drive issues can sometimes corrupt the DLL file, making it unusable.
  • Software Conflict: Sometimes, other software might overwrite the DLL with a different version, leading to incompatibility issues.
  • Deleted DLL File: Accidental deletion by the user or a software uninstallation process can remove the DLL, causing the error.

How to Fix API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is Missing Error

If the issue is encountered by your system, then it’s better to use the methods below mention along with the steps that are efficient enough to solve the API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is missing error.

Method 1: Replace API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL With a Local Copy

Replacing API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL with a local copy can also fix the problem and stops the missing error.

In order to that firstly, you need to check the type of the Windows system and finds the system that contains the same type of windows system, for that here are the steps mention below:

Step 1: Firstly, press the Windows key on the keyboard in order to bring up the search box.

Step 2: Now type the System Information. After that, from the result, then select the System information.

Step 3: Then, see the type of system of the computer.

Now secondly, the API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL should be copied from the working computer and then has to be pasted in the computer facing the problem or issue. And for finding the file here are the following steps:

Step 1: Firstly, press the Windows key and E together to bring up the File Explorer.

Step 2: After that, go to C:\Windows\System32, and type API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL and press the Enter. If no result is shown, then go to C:\Windows\SysWoW64 instead and then search API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL again.

Step 3: Now, as you have found the API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL file paste it on the same location where the file had been copied in the problem computer. This method will most probably solve the problem if not so then follow the other methods.

Method 2: Install Visual C++ Redistributable for Visual Studio 2015

The API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is missing error can also be fixed by installing the Visual C++. Therefore installing the Visual C++ Redistributable for Visual Studio 2015 can solve the missing error. So for installing the software here are the following steps:

Step 1: Firstly, go to this link then click on download.

Step 2: After that, select the system type x64 or x86(x32), then click on the next option. Now then the file will download.

Step 3: Double click the downloaded.exe file when the file is downloaded. Then follow the on-screen steps in order to complete the installation process.

Step 4: Lastly, open the file to check whether it is successfully installed or not.

This method is efficient enough to solve the API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is missing error, and your system won’t be encountered with it again.

Method 3: Install the Universal C Runtime Update

Microsoft has built an update that can be installed through Windows Update. For that here are the following steps mentions below:

Step 1: Firstly, in the start search box type Update and after that, click on the Check for updates or Windows update from the result that is shown. Now click on Check for the updates option.

Step 2: Moreover, Windows should check for the updates automatically then click on the install Updates.

Step 3: After that, restart the computer and check whether the program successfully opens or not.

This method will surely fix the API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is missing error, and your system won’t be facing the error again.

How Do I Run a DLL Application?

DLL files are not directly executable. They are code libraries that applications call upon. To run functions from a DLL:

  • Use the “Run” dialog (Windows + R), type “rundll32.exe [path][name].dll, [FunctionName]”.

Remember, not all DLLs are designed to be explicitly run. Only specific functions within them can be executed this way.

Where Should I Place API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL?

If you’re manually replacing or adding this DLL, it typically resides in the “System32” folder (for 64-bit systems) or the “SysWOW64” folder (for 32-bit systems). However, ensure you download the DLL from a trusted source to avoid potential security issues.

Difference Between Windows API and DLL

  • Windows API (Application Programming Interface): It’s a set of predefined functions provided by Microsoft that allows software to communicate with and utilize Windows OS features. It acts as an interface between software and the OS.
  • DLL (Dynamic Link Library): These are files containing code and data that multiple programs can use simultaneously. DLLs help in modularizing applications so that functionality can be updated and reused more easily. Windows API functions can be housed within DLL files.

In essence, the Windows API is a collection of functions and procedures that applications can invoke to interact with the OS. At the same time, DLLs are the actual files containing these functions and many other reusable code pieces.

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The methods mentions above are efficient and effective enough to solve the API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is Missing and are used by the users mostly. By using the above methods, the issue will be resolved quickly, and you won’t be facing them again.

The API-MS-WIN-CRT-RUNTIME-l1-1-0.DLL is integral for many Windows applications. Understanding its role, addressing its common “missing” error, and discerning the nuances of Windows API and DLL can optimize one’s troubleshooting efforts and streamline application management.

Always remember to source DLLs from reliable sources and keep software up to date to minimize potential issues.