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

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

The api-ms-win-core-string-l1-1-0.dll file is a Dynamic Link Library (DLL) that forms part of the Windows operating system. DLLs are reusable pieces of code and data that can be used by multiple applications to perform specific tasks without needing to have their own copy.

MD5: cae9ec226c29128c8e5371fea65b405f
SHA-1: 81d0346cf7eb4b91eda1bc7ef19d2c44a365b5cb
SHA-256: 786fd682edd113edc78fe4fd3779465048bee6f818de91a098894d699691090e

Where it is used

This particular DLL file, named "api-ms-win-core-string-l1-1-0.dll," is typically used by various Windows components and applications for string-related operations. It contains functions such as comparing strings, folding strings, getting string types, converting between wide characters and multi-byte strings, among others.

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

Common errors associated with this DLL include:

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

File security

The file is part of the Windows operating system and is considered safe. It is not a virus or substitute; rather, it plays a crucial role in string operations within applications.

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

1.
2a. 👉 Try to copy api-ms-win-core-string-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-string-l1-1-0.dll C:\Program Files (x86)\Your program\
👉 Before file replacement, ensure backups are made.
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 resolve issues with this DLL file:

  1. Reinstall the program: If you suspect a specific application is causing an issue, reinstall it.
  2. Update Windows: Ensure your operating system is up to date. This can help fix any compatibility issues with DLL files.
  3. Manually replace api-ms-win-core-string-l1-1-0.dll: Download the correct version of this file from a trusted source and replace the existing one. However, be cautious as replacing system files can have unintended consequences.

FAQ

Is it safe to manually replace api-ms-win-core-string-l1-0.dll?
No, it's not recommended. Manually replacing system files can cause issues and is generally unnecessary.
Can I update the DLL file without updating Windows?
It’s usually better to keep your operating system updated for best compatibility with system files like api-ms-win-core-string-l1-1-0.dll.

Conclusion

The api-ms-win-core-string-l1-1-0.dll file is an essential component of the Windows operating system. Understanding its role and handling any issues with it can help maintain a smooth and stable environment for your applications.


The api-ms-win-core-string-l1-1-0.dll is a system-provided library file that handles string manipulation APIs for core Windows functions.

File Description

  • File Purpose: It acts as an API-set stub interface that routes essential string processing commands (like character conversion, casing, and formatting) from an application to the fundamental Windows operating system kernels.
  • Why the Error Happens: The "Missing" error typically pops up on older Windows OS variants (like Windows 7 or 8) trying to run newer software optimized for Universal Windows API contracts, or due to internal operating system file corruption.

Standard File Locations

Depending on your system's architecture, this file is natively stored in the following secure directories:

  • For 64-bit systems (64-bit DLL location): C:\Windows\System32\
  • For 64-bit systems (32-bit compatibility DLL location): C:\Windows\SysWOW64\
  • Alternative native cache location: C:\Windows\System32\downlevel\

How to Fix the Error Without Downloading Third-Party Files

Downloading standalone DLL files from random internet websites introduces severe security risks like malware. Instead, you can restore this file safely using built-in Windows diagnostics and native updates.

1. Copy From the Native 'Downlevel' Cache Folder

Windows maintains a local backup of these API sets inside its directory structure. You can manually copy it to the program directory.

  1. Open File Explorer and navigate to: C:\Windows\System32\downlevel\
  2. Search or look for api-ms-win-core-string-l1-1-0.dll inside this folder.
  3. Right-click and choose Copy.
  4. Go to the installation folder of the specific application or game that is throwing the error.
  5. Paste the file directly into that program's main directory alongside its executable (.exe) file.

2. Run the System File Checker (SFC)

Use the built-in Windows scanner to find and automatically repair missing or corrupted OS dependencies.

  1. Press the Windows Key, type cmd, right-click on Command Prompt, and select Run as administrator.
  2. Paste the following command and hit Enter:
    sfc /scannow
  3. Let the tool scan to 100% completion and restart your computer.

3. Run Deployment Image Servicing and Management (DISM)

If SFC fails to fix it, use DISM to repair the underlying system image via Windows Update.

  1. Open Command Prompt as an administrator.
  2. Type the following command and hit Enter:
    DISM /Online /Cleanup-Image /RestoreHealth
  3. Once completed, rerun the sfc /scannow command and restart your PC.

4. Reinstall the Triggering Software

Sometimes the error is simply caused by a flawed software installation instance.

  1. Open Control Panel > Programs and Features.
  2. Select the app or game causing the issue and hit Uninstall.
  3. Reinstall it using the original official setup installer to restore its targeted application dependencies.

If you are trying to resolve this for a particular app, feel free to share what program or game is throwing the error, or which Windows version you are currently running so we can pin down a specific solution.

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