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

★★★★★ Verified File (27.08.2026)

Description


Creation date: 20.11.2015 06:52:50
File version: 10.0.10586.15
Antivirus scan: ✅ OK
Category: System
File size: 18.9 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-debug-l1-1-0.dll

Publisher: Microsoft Corporation
Issuer: Microsoft Code Signing PCA
Encryption algorithm: SHA1
Time stamp: Apr 5 06:03:41 2018 GMT

What is a DLL file?

A Dynamic Link Library (DLL) is a collection of programs that can be shared and used by multiple applications simultaneously. These files are essential for the smooth functioning of your Windows operating system, providing support for various system operations.

MD5: a8688aabca7fe918064db471500e4fa8
SHA-1: 99c0f0d0476f2e993bc098892dbf4e7d03eee2ba
SHA-256: 21614888868b2a217e2f5204b3d199756b75c08062bc4de087aa4ba5e3a0ea50

Where it is Used

What is api-ms-win-core-debug-l1-1-0.dll?

This specific DLL file, "api-ms-win-core-debug-l1-1-0.dll," is part of the Windows operating system. It contains functions and methods that are crucial for debugging purposes, including outputting debug strings to help developers diagnose issues in applications.

Errors Related to api-ms-win-core-debug-l1-1-0.dll

Common errors include:

  • "api-ms-win-core-debug-l1-1-0.dll not found"
  • "Missing api-ms-win-core-debug-l1-1-0.dll"
  • "Error loading api-ms-win-core-debug-l1-1-0.dll"

File Security

Is the file safe?

This DLL is a system file provided by Microsoft, which means it is generally safe. However, if you encounter any suspicious activity or errors with this file, ensure that your antivirus software is up to date and perform a full scan.

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

1.
2a. 👉 Try to copy api-ms-win-core-debug-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-debug-l1-1-0.dll C:\Program Files (x86)\Your program\
👉 It is recommended to back up the files before 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

Steps to resolve issues:

  1. Reinstall the program: Sometimes, reinstalling the application can fix missing or corrupted DLL files.
  2. Update Windows: Ensure your operating system is up-to-date. Updates often include fixes for system file issues.
  3. Manually replace api-ms-win-core-debug-l1-1-0.dll: If the above steps do not work, you can try manually replacing this DLL file. However, proceed with caution and ensure you download from a trusted source.

FAQ

Q: Can I replace api-ms-win-core-debug-l1-1-0.dll manually?

A: Yes, you can. However, it is recommended to use the system restore point before making any changes.

Conclusion

If you encounter errors with "api-ms-win-core-debug-l1-1-0.dll," ensure that your system files are up-to-date and that no viruses or malware are present. Regular maintenance can help prevent such issues from arising.


The file api-ms-win-core-debug-l1-1-0.dll is an ApiSet Stub DLL system component required by Windows applications to execute debugging tasks. Errors regarding this missing file can be fixed safely without downloading any standalone DLLs by running the built-in System File Checker (SFC) tool, recovering it from the Windows downlevel directory, or installing official Microsoft Visual C++ Redistributables.

File Description

  • File Name: api-ms-win-core-debug-l1-1-0.dll
  • Type: Dynamic Link Library (DLL) System Component
  • Function: Acts as a proxy/stub file (API Set) providing low-level core OS application programming interfaces for software debugging functions.

Standard File Locations

The file is naturally located across multiple core windows pathways depending on system architecture:

  • 64-bit Core Path: C:\Windows\System32\ (Contains 64-bit binaries)
  • 32-bit Compatibility Path: C:\Windows\SysWOW64\ (Contains 32-bit binaries)
  • Internal Windows Cache: C:\Windows\System32\downlevel\

How to Fix the Error Without Downloading the File

Never download files from unauthorized third-party DLL provider sites as they often harbor malware. Instead, use these trusted native and official methods:

1. Restore from the Built-in Downlevel Cache

Windows maintains a local backup cache of API Set stub libraries inside your operating system directory.

  1. Open File Explorer and go to C:\Windows\System32\downlevel\.
  2. Search for the file api-ms-win-core-debug-l1-1-0.dll in that directory.
  3. Copy the file.
  4. Paste it directly into the installation folder of the software/game that is giving the error.

2. Run System File Checker (SFC)

The Windows SFC utility automatically audits, identifies, and downloads legitimate replacements for damaged OS system files from local component stores.

  1. Press the Windows Key, type cmd.
  2. Right-click Command Prompt and select Run as administrator.
  3. Type the following command and hit Enter:
    sfc /scannow
  4. Wait for the process to complete 100% and restart your machine.

3. Install or Repair Microsoft Visual C++ Redistributables

Many API Set runtime library architectures depend closely on runtime binaries distributed via Microsoft software development frameworks.

  1. Navigate to the official Microsoft website and look for the latest Visual C++ Redistributable Packages (2015-2022).
  2. Download both the x86 and x64 official installation files.
  3. If already installed, execute the downloaded installer and choose Repair; otherwise, click Install.
  4. Restart your system after installation finishes.

4. Run Windows Update

Legacy system versions might lack fundamental core API structural updates.

  1. Open Settings by pressing Win + I.
  2. Go to Update & Security (or Windows Update).
  3. Click Check for updates to download and apply outstanding security and structural package patches.

If you'd like, let me know:

  • Which specific app or game triggers the missing DLL error?
  • Which Windows operating system version (e.g., Windows 10, Windows 11, Windows 7) you are running?

I can help you pinpoint the exact structural software package or application dependency required to clear the issue instantly.

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