Fix ci.dll Errors

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

ci.dll file Code Integrity Module. 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 ci.dll related errors on your device. You can also download ci.dll file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista 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 Vista

File info

General information
Filename ci.dll
File extension DLL
Description Code Integrity Module
Program Microsoft® Windows® Operating System
Author Microsoft Corporation
MIME type application/octet-stream
File type Driver
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 ci.dll file. ci.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 ci.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to ci.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 ci.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.

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

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of ci.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\System32\
  • Windows Vista: C:\Windows\System32\

If the steps did not solve your ci.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 ci.dll
System Windows 10
File size 573504 bytes
Date 2017-03-18
File details
MD5 8629f66f7a47ec930676fafe0b11bcda
SHA1 433798be7ab025b8295cfe368294e67177feb47b
SHA256 2aff6fe78cfcf12096297ecd63e71a45c754f7417b1fce71a97df363d5ec531d
CRC32 a3048bb8
Example file location C:\Windows\System32\
Filename ci.dll
System Windows 8.1
File size 491744 bytes
Date 2014-11-21
File details
MD5 c63769a3eebc211ba84fb8082543de76
SHA1 607a1f90dbf67ee818d2ae53c5c9d29fa1220490
SHA256 7ffe30d2edc3d74fa4dd2114560d0ef77d05fcf0ade52e2bac9c25607274b298
CRC32 af8950ea
Example file location C:\Windows\System32\
Filename ci.dll
System Windows 8
File size 457120 bytes
Date 2012-07-26
File details
MD5 3f82768b29d54e87d94e158f963e37e4
SHA1 35688db260c67058affc63a5d66e7d3ba31b1072
SHA256 9c7b8b6a298f11763e89b36f4cc1cf11493eb247c33a6ac57728411d6dcddac1
CRC32 9b09978b
Example file location 1: C:\Windows\System32\
Filename ci.dll
System Windows 7
File size 780008 bytes
Date 2010-11-21
File details
MD5 11338e0557b07bc32cdb980b6edb35aa
SHA1 23107b72bec2f9c9404ce885442aa630d98b5f95
SHA256 e0b012fddf40d280068c33bbc41cbf14e88e49fd237d61c455c6e69772ecfdaf
CRC32 64f9ac73
Example file location C:\Windows\System32\
Filename ci.dll
System Windows Vista
File size 380392 bytes
Date 2009-04-11
File details
MD5 57d469072472c9f14125a347c522dd18
SHA1 09efc4f32f10dc64282ac5028ba5869e36f75b8a
SHA256 716d93d4711f62c8c7e6116ce3531a2178bf82c730b61d75a59db3dbed9a972c
CRC32 3806780a
Example file location C:\Windows\System32\