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api-ms-win-crt-heap-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: 19.9 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-crt-heap-l1-1-0.dll

Publisher: Microsoft Corporation
Issuer: Microsoft Code Signing PCA
Encryption algorithm: SHA1
Time stamp: Apr 5 06:03:54 2018 GMT

The file api-ms-win-crt-heap-l1-1-0.dll is a Dynamic Link Library (DLL) used by Microsoft Windows operating systems. DLLs are small software modules that contain executable code and data. They enable reusability of functions and resources, reducing the size of applications and improving performance.

MD5: a1c83d9cdf486b9550c8878b7e60bf07
SHA-1: 5ae36450d77682fd6ceb6239bf0bbca46b0f1e8f
SHA-256: ea03703da73c1e59a0836dbbfeae02d6b9664821e987fab301f725b2bfb1fe7d

Where it is used

This particular DLL file contains functions related to heap management in C runtime (CRT) libraries. It is commonly used by various Windows system components and applications, including but not limited to:

  • The Windows shell and explorer for handling memory allocations.
  • Windows services and background processes that require dynamic memory allocation capabilities.
  • Third-party software developed with Microsoft Visual C++ or other development tools that rely on CRT functions.

Errors related to api-ms-win-crt-heap-l1-1-0.dll

Issues with this DLL file can manifest as:

  • "api-ms-win-crt-heap-l1-1-0.dll not found" or "missing api-ms-win-crt-heap-l1-1-0.dll": This error typically occurs when the system cannot locate the required DLL. It might be due to a corrupted file, missing installation, or a configuration issue.
  • "error loading api-ms-win-crt-heap-l1-1-0.dll": This message suggests that Windows was unable to load the DLL during startup or execution of an application. Common causes include outdated system files, hardware failure, or software conflicts.

File security

The file is safe and a legitimate part of Windows. It is not associated with any known viruses or malware. However, it's important to ensure the integrity and authenticity of system files through regular updates from Microsoft.

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

1.
2a. 👉 Try to copy api-ms-win-crt-heap-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-crt-heap-l1-1-0.dll C:\Program Files (x86)\Your program\
👉 Prior to replacing the files, back them up.
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 you suspect an application is causing issues, try reinstalling it. This can often resolve related DLL problems as a new installation will replace any missing or corrupt files.
  2. Update Windows: Ensure your operating system is up-to-date with the latest patches and updates from Microsoft. These updates often include critical fixes for system file issues.
  3. Manually replace api-ms-win-crt-heap-l1-1-0.dll (if necessary): If you have a backup copy of this DLL or downloaded it from a trusted source, you can manually replace the file. However, proceed with caution and ensure you are using an original and verified version.

FAQ

Q: Is api-ms-win-crt-heap-l1-1-0.dll safe to replace manually?

A: Yes, but only if you are certain about the authenticity and origin of the file. Always ensure you use an original Microsoft version.

Q: Can I download this DLL from a website?

A: It's generally best to obtain system files directly from official sources like Windows Update or Microsoft's own support pages for authenticity and security reasons.

Conclusion

The file api-ms-win-crt-heap-l1-1-0.dll plays a crucial role in managing memory allocation within various components of the Windows operating system. Ensuring its integrity is important for maintaining system stability and performance.


api-ms-win-crt-heap-l1-1-0.dll: Description, Location, and Fixes

The file api-ms-win-crt-heap-l1-1-0.dll is a system component required to run applications built with Microsoft Visual Studio. Missing or corrupted file errors usually happen due to incomplete Windows updates or software installation issues.

?? File Description & Standard Location

What is it?

  • Component: Part of the Universal C Runtime (UCRT) in Windows.
  • Function: Handles memory heap allocation functions for software programs.
  • Developer: Microsoft Corporation.

Standard File Locations

Depending on your Windows architecture, the file should reside in the following directories:

  • 64-bit Windows (for 64-bit apps): C:\Windows\System32
  • 64-bit Windows (for 32-bit apps): C:\Windows\SysWOW64
  • 32-bit Windows: C:\Windows\System32

??? How to Fix the Error Without Downloading the DLL File

Downloading individual DLL files from third-party websites is unsafe and can introduce malware. Use these official, built-in methods to repair the file safely.

Method 1: Install or Repair Microsoft Visual C++ Redistributable

This package installs the official, correct version of the missing DLL file.

  1. Press Windows Key + R, type appwiz.cpl, and press Enter.
  2. Scroll down to find Microsoft Visual C++ 2015-2022 Redistributable (both x86 and x64 versions).
  3. Select the program and click Change (or right-click and select Change).
  4. Click Repair in the window that appears.
  5. Restart your computer after the process finishes.

Note: If it is not installed, download the official installer directly from Microsoft's website rather than pulling raw DLL files.

Method 2: Run SFC and DISM System Scans

Windows has built-in tools to scan for and automatically replace missing or corrupted system DLLs.

  1. Press the Windows Key, type cmd, right-click Command Prompt, and select Run as administrator.
  2. Type the following command to check the component store and press Enter: DISM.exe /Online /Cleanup-image /Restorehealth
  3. Wait for it to finish, then type the following command to repair system files and press Enter: sfc /scannaway (Note: Use sfc /scannow - corrected typing below) sfc /scannow
  4. Restart your PC once the verification reaches 100%.

Method 3: Install Pending Windows Updates

The Universal C Runtime is delivered as part of Windows Update.

  1. Press Windows Key + I to open Settings.
  2. Go to Update & Security (or Windows Update on Windows 11).
  3. Click Check for updates.
  4. Download and install all critical and optional updates, then restart your PC.

Method 4: Reinstall the Problematic Program

If the error occurs only when opening one specific app, that app's installation might be broken.

  1. Open appwiz.cpl via the Run dialog (Win + R).
  2. Right-click the program causing the error and select Uninstall.
  3. Restart your computer.
  4. Reinstall the program using its official installer.

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