Repair and Download ext-ms-win-firewallapi-webproxy-l1-1-0.dll Now

Sometimes Windows system displays error messages regarding corrupted or missing ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-l1-1-0.dll file can therefore effect in failed execution of the started process.

ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-l1-1-0.dll related errors on your device. You can also download ext-ms-win-firewallapi-webproxy-l1-1-0.dll file compatible with Windows 8.1, Windows 8 devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 8.1, Windows 8

File info

General information
Filename ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-l1-1-0.dll file. ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-l1-1-0.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

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



Application could not be started because ext-ms-win-firewallapi-webproxy-l1-1-0.dll file is missing. Reinstall the application to solve the problem.


Problems related to ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-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.

ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-l1-1-0.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-l1-1-0.dll file

The last solution is to manually download and replace ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-l1-1-0.dll file example directory paths.

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

If the steps did not solve your ext-ms-win-firewallapi-webproxy-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 ext-ms-win-firewallapi-webproxy-l1-1-0.dll
System Windows 8.1
File size 3584 bytes
Date 2013-08-22
File details
MD5 1aca2c827dd65d868fd1428b339536f6
SHA1 e30c27327f6534dbf7b43893191de59e4bbc1cf5
SHA256 ece18dde51429b5bb48a27b07fe5460b317c695666e2c50b64108eef0da34963
CRC32 f3e03a7f
Example file location C:\Windows\System32\
Filename ext-ms-win-firewallapi-webproxy-l1-1-0.dll
System Windows 8
File size 3584 bytes
Date 2012-07-26
File details
MD5 d87f7ade6292d8737c567b25d0fd45ca
SHA1 7c29dc6720547b51e3814f5e594e4a6d8673e3a1
SHA256 6edeaa1874181053ad0d750bf27344cc9d34af99aa0c4ef928346d745e190dd8
CRC32 68b64e75
Example file location 1: C:\Windows\System32\