efscore.dll Troubleshoot and Download

Sometimes Windows system displays error messages regarding corrupted or missing efscore.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 efscore.dll file can therefore effect in failed execution of the started process.

efscore.dll file EFS Core Library. 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 efscore.dll related errors on your device. You can also download efscore.dll file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows 7 devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows 7

File info

General information
Filename efscore.dll
File extension DLL
Description EFS Core Library
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.)

There are various types of errors related to efscore.dll file. efscore.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 efscore.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

  • efscore.dll is corrupted
  • efscore.dll cannot be located
  • Runtime Error - efscore.dll
  • efscore.dll file error
  • efscore.dll file cannot be loaded. Module was not found
  • cannot register efscore.dll file:
  • efscore.dll file could not be loaded
  • efscore.dll file doesn't exist



Application could not be started because efscore.dll file is missing. Reinstall the application to solve the problem.


Problems related to efscore.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 efscore.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.

efscore.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 efscore.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 efscore.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 efscore.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 efscore.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the efscore.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 efscore.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 efscore.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 efscore.dll file

The last solution is to manually download and replace efscore.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 efscore.dll file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of efscore.dll file example directory paths.

  • Windows 10: C:\Windows\System32\
  • Windows 8.1: C:\Windows\System32\
  • Windows 8: 1: C:\Windows\System32\
  • Windows 7: C:\Windows\SysWOW64\
  • Windows 7: C:\Windows\SysWOW64\

If the steps did not solve your efscore.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 efscore.dll
System Windows 10
File size 737688 bytes
Date 2017-03-18
File details
MD5 d8cfb126ecf5ba99d89aeaa7ba187a64
SHA1 3fb66a2e0d75ab633dadab382d5addb853a13bb6
SHA256 d5c945827ffe87f728aa57433f4908201aede99439ce6b44cf012e34d63c78d1
CRC32 c81d0640
Example file location C:\Windows\System32\
Filename efscore.dll
System Windows 8.1
File size 321024 bytes
Date 2014-11-21
File details
MD5 71e5edd82053ad8aa65fc5daa590fc39
SHA1 f898550fcd7a8481197e034a125d5046b3534ada
SHA256 d39c0b7a8a06412b6663f332421e8d205f896b36bd2367532c7cfc992d6889be
CRC32 7965a544
Example file location C:\Windows\System32\
Filename efscore.dll
System Windows 8
File size 196608 bytes
Date 2012-07-26
File details
MD5 9eb0ee2d087e144ce4149a998bdb6b80
SHA1 2bc0d733c7c694394ba2284894fad0bf9994c208
SHA256 4a51fec8bc5ab45f171ea510028ed00ad89dc9cf87f5b4cb74e9d37840ab0939
CRC32 dded40bf
Example file location 1: C:\Windows\System32\
Filename efscore.dll
System Windows 7
File size 205312 bytes
Date -0001-11-30
File details
MD5 3f6d9269e7b3a754b1c2f8533dc7f318
SHA1 3c859945ff203590ecd0466ff876c5b283127ad4
SHA256 c805967dd9974ce96471482f6da26073638ef3d2623c82880324dd7c7e839e09
CRC32 663abb2f
Example file location C:\Windows\SysWOW64\
Filename efscore.dll
System Windows 7
File size 304128 bytes
Date 2010-11-21
File details
MD5 7f8e83b9466a0a002d4ab15c104062a7
SHA1 71bc76c1f0da1e7dd1178ab8cbcf323add044b00
SHA256 d2d64b95079243f04479a7950afb9dd086c43bf0236e72e74fc45c6945a765e4
CRC32 ee65ae42
Example file location C:\Windows\SysWOW64\