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api-ms-win-core-processthreads-l1-1-0.dll - Analyze and How to Fix Errors

★★★★★ Verified File (27.08.2026)

Description


Creation date: 20.11.2015 06:52:51
File version: 10.0.10586.15
Antivirus scan: ✅ OK
Category: System
File size: 20.9 kb.
Architecture: 64-bit (x64)
✅ This file is compatible with 64-bit Windows and ❌ will not work on a 32-bit operating system.
How to determine your system architecture: Press keys Win+R , enter symbols wmic os get osarchitecture , press Enter.

Digital file signature api-ms-win-core-processthreads-l1-1-0.dll

Publisher: Microsoft Corporation
Issuer: Microsoft Code Signing PCA
Encryption algorithm: SHA1
Time stamp: Apr 5 06:03:46 2018 GMT

The api-ms-win-core-processthreads-l1-1-0.dll file is a Dynamic Link Library (DLL) that plays a crucial role in the Windows operating system. DLLs are reusable modules that contain executable code and data, which can be shared by multiple programs to minimize redundancy and optimize system performance.

MD5: 9b3a5ec962d85590dd9104ed84345a66
SHA-1: 0bb9aa172f73d5ff8c6d30555aac21ed66b7d331
SHA-256: f4fce22b304c09404568ea25c8f7b29fc3d4dd8526dca4127a5781420f2a02d4

Where it is used

This specific DLL file is part of the Windows Core Libraries. It is used by various components within the operating system and application programs that require functionalities related to process management, thread creation, and other core system operations. Some likely programs or components that might use this DLL include:

  • Windows Explorer
  • Task Manager
  • System Services
  • Various application programs that require process control capabilities

Errors related to api-ms-win-core-processthreads-l1-1-0.dll

The absence or malfunction of this DLL can lead to several issues, including:

  • "api-ms-win-core-processthreads-l1-1-0.dll not found"
  • "missing api-ms-win-core-processthreads-l1-1-0.dll"
  • "error loading api-ms-win-core-processthreads-l1-1-0.dll"

File Security

The file characteristics indicate that it is a safe system component. The DLL has been signed and verified by Microsoft, ensuring its integrity and reliability. However, if the file gets corrupted or tampered with, it can lead to unexpected behavior in programs that rely on it.

api-ms-win-core-processthreads-l1-1-0.dll was not found
The code execution cannot proceed because api-ms-win-core-processthreads-l1-1-0.dll was not found
Failed to load api-ms-win-core-processthreads-l1-1-0.dll
The procedure entry point ... could not be located in api-ms-win-core-processthreads-l1-1-0.dll

1.
2a. 👉 Try to copy api-ms-win-core-processthreads-l1-1-0.dll C:\Program Files\Your program\
2b. Also try to copy to bin, lib folders.
2c. Try to copy api-ms-win-core-processthreads-l1-1-0.dll C:\Program Files (x86)\Your program\
👉 Make backups of the files before proceeding with replacement.
How do I switch to the current Windows directory?
- Press and hold the key "win" on the keyboard and press the key "r" , then write %windir% and press the key Enter.
How to switch to the directory Program Files (x86) ?
- Press Win+R then enter %ProgramFiles(x86)% and after press Enter.

How to fix errors

  1. Reinstall the program: If a specific application is experiencing issues due to missing or corrupt DLL files, reinstalling the application can resolve the problem. This often addresses issues with individual programs that depend on this DLL.
  2. Update Windows: Keeping your operating system up-to-date ensures you have all the latest patches and security updates, including those that might fix issues related to system DLLs.
  3. Manually replace api-ms-win-core-processthreads-l1-1-0.dll: If the above methods do not resolve the issue, you can try replacing the file. To do this, download a trusted version of the file from Microsoft's official sources and manually copy it to the appropriate system directory.

FAQ

Q: Can api-ms-win-core-processthreads-l1-1-0.dll be a virus?

A: No, it is a legitimate system file provided by Microsoft. If you encounter issues with this DLL, they are usually related to corruption or missing files rather than malware.

Conclusion

The api-ms-win-core-processthreads-l1-1-0.dll file is an essential part of the Windows operating system, responsible for managing processes and threads. Issues with this DLL can cause various errors, but they are typically resolved by reinstalling applications, updating Windows, or manually replacing the file.


The api-ms-win-core-processthreads-l1-1-0.dll file is a core Windows operating system component responsible for handling process and thread management functions.

File Description

This file is an ApiSet Stub DLL used by the Windows operating system loader to route API calls efficiently to the correct underlying system libraries (such as kernel32.dll or kernelbase.dll). It is a critical part of the Microsoft Universal C Runtime (UCRT) and the Windows API sets infrastructure.

Standard File Location

On a standard Windows installation, this file is located in the following system directories depending on your architecture:

  • 64-bit systems (64-bit file): C:\Windows\System32\
  • 64-bit systems (32-bit compatibility file): C:\Windows\SysWOW64\
  • Built-in System Backup folder: C:\Windows\System32\downlevel\

How to Fix Errors Without Downloading from Third-Party Sites

You should never download standalone DLL files from unverified websites, as they can contain malware or be incompatible. Instead, use these official Windows methods to repair or restore the file:

1. Copy From the Local "Downlevel" Backup Folder

Windows stores legitimate backup copies of ApiSet stub files locally on your machine.

  • Open File Explorer and navigate to C:\Windows\System32\downlevel\.
  • Locate api-ms-win-core-processthreads-l1-1-0.dll.
  • Copy the file and paste it directly into the installation folder of the specific application or game that is failing to launch.

2. Run the System File Checker (SFC)

The built-in Windows utility will automatically scan your system and replace missing or corrupted official files.

  1. Press the Windows Key, type cmd, right-click on Command Prompt, and select Run as administrator.
  2. Execute the following command and hit Enter:
    sfc /scannow
  3. Wait for the process to complete, then restart your PC.

3. Install or Repair Microsoft Visual C++ Redistributable

This file belongs to system runtimes often installed via Visual Studio packages.

  • Go to the official Microsoft website and download the Visual Studio 2015, 2017, 2019, and 2022 Redistributable.
  • Download both the vc redist.x86.exe (32-bit) and vc redist.x64.exe (64-bit) installers.
  • Run the files, select Repair (or Install if missing), and restart your machine.

4. Run Windows Update

Missing runtime components are often delivered through standard system upgrades.

  • Open your system Settings (Win + I).
  • Navigate to Update & Security > Windows Update.
  • Click Check for updates, download any pending packages, and reboot.

If the error continues to occur, let me know which application or game triggers it and what version of Windows you are using so I can provide a more targeted solution.

Other versions:
️ api-ms-win-core-processthreads-l1-1-0.dll 10.0.17134.12 32-bit (x86)
Microsoft Corporation