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api_ms_win_crt_runtime_l1_1_0.dll

Updated: Files Available: 24
Verified Metadata AI Analysis x86-64 (64 bit) x86 (32 bit)

Download and install api_ms_win_crt_runtime_l1_1_0.dll to fix missing or corrupted DLL errors.

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DLL Overview

Last Updated
Jan 12th, 2025
Filename
api_ms_win_crt_runtime_l1_1_0.dll
Company
Microsoft Corporation
Product
Microsoft® Windows® Operating System
Description
ApiSet Stub DLL
Architecture
x86-64 (64 bit) x86 (32 bit)
Metadata Consensus
24/24 Files 100%
Higher percentages indicate stronger agreement across versions. View available versions or browse repository metadata to compare differences between variants.

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About api_ms_win_crt_runtime_l1_1_0.dll

api_ms_win_crt_runtime_l1_1_0.dll is a DLL file (Dynamic Link Library) used by Windows programs to share code and resources. It allows multiple applications to use the same functions, improving performance and reducing redundancy.

AI-assisted overview · Nov 30, 2025

Overview

What Is api_ms_win_crt_runtime_l1_1_0.dll?

api_ms_win_crt_runtime_l1_1_0.dll is a Microsoft ApiSet Stub DLL, included as part of the Microsoft® Windows® Operating System. It belongs to the Windows "ApiSet" forwarder architecture, which redirects API calls from older or abstracted DLL names to the real underlying Windows runtime libraries.

Verified Metadata:

  • Company: Microsoft Corporation
  • Product: Microsoft® Windows® Operating System
  • Description: ApiSet Stub DLL
  • Architecture: Provided in both x86 and x64 depending on OS version

This DLL is a lightweight redirection module. It does not contain full runtime code — instead, it forwards requests to true system libraries such as ucrtbase.dll in the Universal CRT.

What api_ms_win_crt_runtime_l1_1_0.dll Does

Windows uses ApiSet DLLs to:

  • Provide stable compatibility layers for applications
  • Redirect API calls to the correct version of the Windows C Runtime (CRT)
  • Enable modularization of the Windows system libraries
  • Reduce dependency issues across different Windows builds

In this case, api_ms_win_crt_runtime_l1_1_0.dll is associated with the Universal C Runtime (UCRT) introduced in Windows 10.

Applications that rely on the UCRT may reference this stub DLL indirectly.

Where This DLL Comes From

A legitimate copy always comes from:

  • The Windows operating system itself, or
  • The Microsoft Visual C++ Redistributable packages (2015–2022)

It is included automatically during:

  • Windows updates
  • Servicing stack updates
  • Visual C++ runtime installation
  • .NET, Visual Studio, and application installers bundling the UCRT

Common api_ms_win_crt_runtime_l1_1_0.dll Error Messages

api_ms_win_crt_runtime_l1_1_0.dll was not found
The program can’t start because api_ms_win_crt_runtime_l1_1_0.dll is missing
Error loading api_ms_win_crt_runtime_l1_1_0.dll
The code execution cannot proceed because api_ms_win_crt_runtime_l1_1_0.dll is missing

These errors indicate that the Universal CRT is missing or not installed correctly.

Why These Errors Occur

  • Missing or damaged Visual C++ Runtime (2015–2022)
  • Corrupted Windows system update
  • Broken UCRT installation
  • System files deleted or altered by cleanup tools
  • Windows 7/8 systems missing the required UCRT update

Older operating systems must install the UCRT update manually, which is why this DLL is often reported missing.

How To Fix api_ms_win_crt_runtime_l1_1_0.dll Errors

1. Install the Microsoft Visual C++ Redistributable (2015–2022)

This is the official way to restore this DLL.

Microsoft download (x64 / x86):

Install both x86 and x64 versions if you are on a 64-bit machine.

2. Install Required Windows Updates (Especially on Windows 7/8)

Older systems require the Universal CRT (KB2999226).

Installing all pending Windows Updates normally restores these files.

3. Repair System Files

If Windows system files are corrupted:

Run SFC:

sfc /scannow

Then DISM (Windows 8.1 / 10 / 11):

dism /online /cleanup-image /restorehealth

4. Reinstall or Repair the Application

Some applications bundle their own UCRT version. Reinstalling can restore the missing components.

Manual Installation Notes

If you restore this DLL manually:

  • Place it in the application's directory only if the software documented it
  • Do not place it in System32 or SysWOW64 manually

Windows protects and manages ApiSet DLLs through system updates.

Installing the Visual C++ Redistributable is the correct fix.

Summary

  • api_ms_win_crt_runtime_l1_1_0.dll is a Microsoft ApiSet Stub DLL used by the Universal C Runtime.
  • It redirects API calls to core C runtime components such as ucrtbase.dll.
  • Missing-DLL errors almost always indicate a broken or missing Visual C++ Runtime or Windows update.
  • Installing the official Visual C++ Redistributable (2015–2022) and required Windows updates restores this file.

If you need a specific version of api_ms_win_crt_runtime_l1_1_0.dll, you can request it on the file page for prioritization.

File information is supported by Human Assisted Artificial Intelligence and should be used as a helpful tool. However, it is important to keep in mind that this information may not be up-to-date or entirely accurate.

Troubleshooting DLL Errors

Most errors involving api_ms_win_crt_runtime_l1_1_0.dll occur because the DLL is missing, corrupted, or outdated. In many cases, reinstalling the related application or replacing the DLL resolves the issue. The steps below cover the most common and reliable ways to fix these errors.

Windows DLL Error Examples

This application has failed to start because api_ms_win_crt_runtime_l1_1_0.dll was not found. Re-installing the application may fix this problem.
api_ms_win_crt_runtime_l1_1_0.dll Not Found.

Fixes and Solutions

The first step in resolving DLL errors is to completely uninstall the affected software and reinstall its latest version. We know this does not always solve the problem, which is why DLLme exists. If reinstalling the application does not help, or if you are unsure which app is causing the error, follow the steps below. These are the most common solutions for fixing api_ms_win_crt_runtime_l1_1_0.dll errors.

  • Repair Windows: Make sure Windows is fully updated, then open Windows Terminal or PowerShell as an administrator (search for “PowerShell” in the Start menu, right-click it, and choose “Run as administrator”). This allows you to repair the Windows component store and run the System File Checker (SFC).

    Repair the Windows component store so SFC can pull clean files:

    DISM /Online /Cleanup-Image /RestoreHealth

    Scan all protected system files and automatically repair problems:

    sfc /scannow
  • Uninstall & Reinstall: On this DLL page, check the Company/Product section to identify the related app, then fully uninstall it. If you plan to continue using it, reinstall the latest version. Be sure to save or back up any important data before uninstalling. Windows or antivirus software may sometimes quarantine DLL files, especially if the DLL is unfamiliar or appears suspicious. Check your antivirus quarantine or logs to determine if this is the cause of your issue.
  • Download the DLL: Download the latest 32-bit or 64-bit version of the DLL directly from our repository using the download button above. Most users will need the 64-bit version, but if you are unsure, or if a 64-bit version is not available, you can install both the 32-bit and 64-bit DLLs. DLLme verifies DLLs that come from our admins, partners, and trusted affiliates. User-uploaded files may be verified later if a trusted source is confirmed.
  • Register the DLL: Most DLL files do not need registration, but some DLLs are COM components and must be registered to work correctly. If registration is required, open Windows Terminal or PowerShell as an administrator.

    Register the DLL (you can also drag the DLL file into the window to automatically fill in its full path): 

    regsvr32 "C:\path\to\api_ms_win_crt_runtime_l1_1_0.dll"

    If you are registering a 32-bit DLL on 64-bit Windows, use the 32-bit RegSvr32: 

    C:\Windows\SysWOW64\regsvr32 "C:\path\to\api_ms_win_crt_runtime_l1_1_0.dll"

    Or open Windows Terminal/PowerShell in the DLL’s folder and run: 

    regsvr32 api_ms_win_crt_runtime_l1_1_0.dll

How to Install api_ms_win_crt_runtime_l1_1_0.dll

To install api_ms_win_crt_runtime_l1_1_0.dll, place the DLL file in the appropriate Windows system folder or in the same folder as the application’s .exe file. If you are not sure which version (32-bit or 64-bit) to use, you can safely install both.

On 64-bit versions of Windows, place 64-bit DLL files in:

C:\Windows\System32\api_ms_win_crt_runtime_l1_1_0.dll

Place 32-bit DLL files in:

C:\Windows\SysWOW64\api_ms_win_crt_runtime_l1_1_0.dll

Or place the DLL file next to the application’s .exe:

C:\path\to\exe\api_ms_win_crt_runtime_l1_1_0.dll

DLL Metadata

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