Fix api-ms-win-security-lsapolicy-l1-1-0.dll Errors

Sometimes Windows system displays error messages regarding corrupted or missing api-ms-win-security-lsapolicy-l1-1-0.dll files. Situations like that can occur, for example, during a software installation process. Each software program requires certain resources, libraries, and source data to work properly. Corrupted or nonexistent api-ms-win-security-lsapolicy-l1-1-0.dll file can therefore effect in failed execution of the started process.

api-ms-win-security-lsapolicy-l1-1-0.dll file ApiSet Stub DLL. The file was developed by for use with software. Here you will find detailed information about the file and instructions how to proceed in the event of api-ms-win-security-lsapolicy-l1-1-0.dll related errors on your device. You can also download api-ms-win-security-lsapolicy-l1-1-0.dll file compatible with Windows 10, Windows 8.1, Windows 8.1, Windows 8 devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 10, Windows 8.1, Windows 8.1, Windows 8

File info

General information
Filename api-ms-win-security-lsapolicy-l1-1-0.dll
File extension DLL
Description ApiSet Stub DLL
Program Microsoft® Windows® Operating System
Author Microsoft Corporation
MIME type application/octet-stream
File type Dynamic link library
System Windows NT 32-bit
Copyrights © Microsoft Corporation. All rights reserved.
Character set Unicode
Language cod English (U.S.)
Fix File Errors

There are various types of errors related to api-ms-win-security-lsapolicy-l1-1-0.dll file. api-ms-win-security-lsapolicy-l1-1-0.dll file may be located in wrong file directory on your device, may not be present in the system, or may be infected with malicious software and therefore not work correctly. Below is a list of most common error messages related to api-ms-win-security-lsapolicy-l1-1-0.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

  • api-ms-win-security-lsapolicy-l1-1-0.dll is corrupted
  • api-ms-win-security-lsapolicy-l1-1-0.dll cannot be located
  • Runtime Error - api-ms-win-security-lsapolicy-l1-1-0.dll
  • api-ms-win-security-lsapolicy-l1-1-0.dll file error
  • api-ms-win-security-lsapolicy-l1-1-0.dll file cannot be loaded. Module was not found
  • cannot register api-ms-win-security-lsapolicy-l1-1-0.dll file:
  • api-ms-win-security-lsapolicy-l1-1-0.dll file could not be loaded
  • api-ms-win-security-lsapolicy-l1-1-0.dll file doesn't exist



Application could not be started because api-ms-win-security-lsapolicy-l1-1-0.dll file is missing. Reinstall the application to solve the problem.


Problems related to api-ms-win-security-lsapolicy-l1-1-0.dll can be addressed in various ways. Some methods are meant only for advanced users. If you don't have confidence in your skills, we suggest consulting a specialist. Fixing api-ms-win-security-lsapolicy-l1-1-0.dll file errors should be approached with utmost caution for any mistakes can result in unstable or unproperly working system. If you have the necassary skills, please proceed.

api-ms-win-security-lsapolicy-l1-1-0.dll file errors can be caused by various factors, so its is beneficial to try to fix them using various methods.

Step 1: Scan your computer for any malicious software

Virus Scan

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with api-ms-win-security-lsapolicy-l1-1-0.dll file or any other Windows system files should be scanning the system for malicious software using an antivirus tool.

If by any chance you don't have any antivirus software installed on your system yet, you should do it immediately. Unprotected system is not only a source of file errors, but, more importantly, makes your system vulnerable to many dangers. If you don't know which antivirus tool to choose, consult this Wikipedia article – comparison of antivirus software.

Step 2: Update your system and drivers.

Windows Update

Installing relevant Microsoft Windows patches and updates may solve your problems related to api-ms-win-security-lsapolicy-l1-1-0.dll file. Use dedicated Windows tool to perform the update.

  1. Go to the Windows "Start" menu
  2. Type "Windows Update" in the search field
  3. Choose the appropriate software program (name may vary depending on your system version)
  4. Check if your system is up to date. If any unapplied updates are listed, install them immediately.
  5. After the update has been done,restart your computer in order to complete the process.

Beside updating the system, it is recommended that you install latest device drivers, as drivers can influence proper working of api-ms-win-security-lsapolicy-l1-1-0.dll or other system files. In order to do so, go to your computer or device producer's website where you will find information regarding latest driver updates.

Step 3: Use System File Checker (SFC) tool

System File Checker

System File Checker is a Microsoft Windows tool. As the name suggests, the tool is used for identyfing and addressing system file related errors, including those related to api-ms-win-security-lsapolicy-l1-1-0.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the api-ms-win-security-lsapolicy-l1-1-0.dll file with properly working version. To use the tool:

  1. Go to the Windows "Start" menu
  2. Type "cmd" in the search field
  3. Locate "Command Prompt" result – don't run it yet:
  4. Click the right mouse button and select "Run as Administrator" option
  5. Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Windows Recovery

Another approach is to restore system to previous state, before the api-ms-win-security-lsapolicy-l1-1-0.dll file error occured. In order to restore your system, follow the instructions below

  1. Go to the Windows "Start" menu
  2. Type "System Restore" in the search field
  3. Start the system restore tool – it's name may differ depending on version of the system
  4. The application will guide you through the process – read the messages carefully
  5. After the process has finished, restart your computer.

If all the above-mentioned methods failed and the api-ms-win-security-lsapolicy-l1-1-0.dll file problem has not been resolved, proceed to the next step. Remember that the following steps are intended only for advanced users.

Download and replace api-ms-win-security-lsapolicy-l1-1-0.dll file

The last solution is to manually download and replace api-ms-win-security-lsapolicy-l1-1-0.dll file in appropriate folder on the disk. Select file version compatible with your operating system and click the "Download" button. Next, go to your web browser's "Downloaded" folder and copy the downloaded api-ms-win-security-lsapolicy-l1-1-0.dll file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of api-ms-win-security-lsapolicy-l1-1-0.dll file example directory paths.

  • Windows 10: C:\Windows\System32\downlevel\
  • Windows 8.1: C:\Windows\System32\
  • Windows 8.1: C:\Windows\System32\
  • Windows 8: 1: C:\Windows\System32\

If the steps did not solve your api-ms-win-security-lsapolicy-l1-1-0.dll file problem, you should consult a professional. A probability exists that the error(s) might be device-related and therefore should be resolved at the hardware level. A fresh operating system installation might be necessary – a faulty system installation process can result in data loss.

File versions list

Filename api-ms-win-security-lsapolicy-l1-1-0.dll
System Windows 10
File size 12192 bytes
Date 2017-03-18
File details
MD5 30e156df0ab1c36064fea21a282d79bc
SHA1 ec88609910884b7cb37d01d957ab23efc71405b2
SHA256 a3dc667157994ff4489b08d2ef42e6774bc219221f2245742415b2b85db2cb3c
CRC32 49472ddb
Example file location C:\Windows\System32\downlevel\
Filename api-ms-win-security-lsapolicy-l1-1-0.dll
System Windows 8.1
File size 3584 bytes
Date 2013-08-22
File details
MD5 33cc47518c708489d190b4e4b86de901
SHA1 a1403423886e8a104eb9c7061858159ef53b6c7f
SHA256 bc04623c491c5c7f73f6f75d4eddecf22cd8c054d44120957d05920909a1566f
CRC32 4e30aa69
Example file location C:\Windows\System32\
Filename api-ms-win-security-lsapolicy-l1-1-0.dll
System Windows 8.1
File size 4096 bytes
Date -0001-11-30
File details
MD5 a5647e439f5e951b9274fe60c6873d7d
SHA1 582656fc5889a03156602c1d98313085f1b42b91
SHA256 d60c20c9bdfd0e2cc2030168355950a9706fbe64d564c0ef4b0ae8e8a36ad95d
CRC32 1f76a914
Example file location C:\Windows\System32\
Filename api-ms-win-security-lsapolicy-l1-1-0.dll
System Windows 8
File size 3584 bytes
Date 2012-07-26
File details
MD5 4b7dbfbd26d39ddc3bd3bf52d47069ee
SHA1 a5ba3d113d921b7199d76acab3997b9598ad0763
SHA256 9c6964d311eb723471c922fa30ac8c7185633570d64f0b8078552f5d653fae7b
CRC32 7d3c91ef
Example file location 1: C:\Windows\System32\