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api-ms-win-core-synch-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-synch-l1-1-0.dll

Publisher: Microsoft Corporation
Issuer: Microsoft Code Signing PCA
Encryption algorithm: SHA1
Time stamp: Apr 5 06:03:50 2018 GMT

api-ms-win-core-synch-l1-1-0.dll is a system library file used in Windows operating systems. DLL stands for Dynamic Link Library, and these files contain code and data that can be used by multiple programs simultaneously to avoid redundancy.

MD5: a0463b2c2e544eef4daa9874f68aceb9
SHA-1: 4e8ca3ee8fbed527b9c6c11a2ec7ce93dd71a9ab
SHA-256: 929f2b957cc0f51345a5e24fda44ed47c2f0b2908c0f3f4db33fe97ab31c0709

Where it is used

This specific DLL file is part of Microsoft’s Windows libraries and provides synchronization functions. It is likely involved in the operations related to managing threads, events, and semaphores for process synchronization.

  • Potential programs or components that might use this include system processes and applications like Task Manager, File Explorer, and various system utilities.
  • It may also be used by application developers who need to manage thread synchronization in their software.

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

Common issues include:

  • "api-ms-win-core-synch-l1-1-0.dll not found": The file is missing or corrupted, which can cause system instability.
  • "missing api-ms-win-core-synch-l1-1-0.dll": Indicates the same issue as above but in a more concise form.
  • "error loading api-ms-win-core-synch-l1-1-0.dll": The system fails to load the file, potentially due to incorrect permissions or a corrupted file.

File Security

The DLL characteristics indicate it is a high-reliability and secure file. However, like any system file, it should be treated with caution. To ensure security:

  • Do not download or replace this file from untrusted sources.
  • Only manually replace the file if you are certain of its authenticity and necessary for a fix.
api-ms-win-core-synch-l1-1-0.dll was not found
The code execution cannot proceed because api-ms-win-core-synch-l1-1-0.dll was not found
Failed to load api-ms-win-core-synch-l1-1-0.dll
The procedure entry point ... could not be located in api-ms-win-core-synch-l1-1-0.dll

1.
2a. 👉 Try to copy api-ms-win-core-synch-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-synch-l1-1-0.dll C:\Program Files (x86)\Your program\
👉 Back up the files before you replace them.
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

To address issues related to this DLL, consider the following steps:

  1. Reinstall the program: If an application is causing the issue, reinstalling it may resolve any corrupted files.
  2. Update Windows: Ensure your operating system and all components are up-to-date to avoid compatibility issues.
  3. Manually replace api-ms-win-core-synch-l1-1-0.dll (if necessary): If you have a known good copy of the DLL, you can replace it. However, proceed with caution:

Note: Only attempt to manually replace this file if you are confident in your actions and possess a reliable source for the correct version.

FAQ

  • Q: Is api-ms-win-core-synch-l1-1-0.dll safe?
    A: It is generally safe, but always be cautious when dealing with system files.
  • Q: Can I replace this file manually?
    A: Yes, if you have a verified copy and understand the risks involved.

Conclusion

The api-ms-win-core-synch-l1-1-0.dll file is an essential part of Windows for managing synchronization tasks. Ensuring its integrity and proper functioning can significantly impact your system's stability.


?? File Description: api-ms-win-core-synch-l1-1-0.dll

The api-ms-win-core-synch-l1-1-0.dll is an ApiSet Stub DLL designed by Microsoft for the Windows operating system. It belongs to the Windows API core subsystem and manages synchronization functions (such as mutexes, semaphores, critical sections, and events) shared across multiple Windows applications. It acts as an architectural proxy to route software logic to underlying kernel libraries like kernel32.dll.

?? Standard File Locations

On a healthy Windows system, this file resides natively inside the default system system paths:

  • For 64-bit systems (64-bit DLLs): C:\Windows\System32\
  • For 64-bit systems (32-bit compatibility DLLs): C:\Windows\SysWOW64\
  • Alternative / Downlevel path: C:\Windows\SysWOW64\downlevel\ or C:\Windows\System32\downlevel\

??? How to Fix the Error (Without Downloading External Files)

You should not download individual DLL files from third-party sites due to high malware and stability risks. Use these native internal Windows recovery methods instead:

1. Run the System File Checker (SFC)

Windows features a native tool that automatically inspects and replaces missing or corrupted systemic DLL files:

  1. Press the Windows Key, type cmd, right-click Command Prompt, and choose Run as administrator.
  2. Execute the following repair sequence command:
    sfc /scannow
  3. Wait until the system reaches 100% completion, then restart your computer.

2. Copy the Native Stub from the 'downlevel' Directory

If the application specifically struggles to identify the systemic path, copy Windows' internal pre-existing backup:

  1. Open Windows File Explorer and navigate to: C:\Windows\System32\downlevel\
  2. Search for api-ms-win-core-synch-l1-1-0.dll.
  3. Right-click the file and select Copy.
  4. Navigate to the installation directory folder of the game or software throwing the error and Paste it directly there.

3. Trigger Windows Update

Windows Updates inherently package core Universal C Runtime and ApiSet components:

  1. Open Settings (Win + I) ?? Update & Security / Windows Update.
  2. Click Check for updates.
  3. Let Windows automatically install missing architectural updates and reboot.

4. Reinstall the Trigger Program

If a specific application or game crashes on start, its original payload might be broken:

  1. Uninstall the software via Control Panel ?? Programs and Features.
  2. Run the application's official offline setup executable or installer again to restore built-in software associations.
Other versions:
️ api-ms-win-core-synch-l1-1-0.dll 10.0.17134.12 32-bit (x86)
Microsoft Corporation