dpapi.dll Troubleshoot and Download

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

dpapi.dll file Data Protection API. 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 dpapi.dll related errors on your device. You can also download dpapi.dll file compatible with Windows 10, 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

File info

General information
Filename dpapi.dll
File extension DLL
Description Data Protection API
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 dpapi.dll file. dpapi.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 dpapi.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to dpapi.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 dpapi.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.

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

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

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

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

If the steps did not solve your dpapi.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 dpapi.dll
System Windows 10
File size 13312 bytes
Date 2017-03-18
File details
MD5 efafd51012dd5aeaf113ae3322fcf991
SHA1 142a6dfecc1b4d6c0ffcec2928ba1fbb048f8df7
SHA256 6d985ad5ce05355df79d7da8e3a7b0b306714f1bdc9ee1a5e2341326bb79b40f
CRC32 fc67347f
Example file location C:\Windows\System32\
Filename dpapi.dll
System Windows 8.1
File size 12800 bytes
Date 2014-11-21
File details
MD5 65a6f9a2826d8de0f92431043851b85f
SHA1 b98161a1e59a2f57b89fde53d9cbfc059842b4d3
SHA256 4445d1fe2e029080a6ea8bea53ed6a574bbceceb644c0d9b488387a8bb0d1c12
CRC32 847045a1
Example file location C:\Windows\System32\
Filename dpapi.dll
System Windows 8
File size 10752 bytes
Date 2012-07-26
File details
MD5 64e93ed82eb4a29208b862a3f592ca36
SHA1 3e4e97732b87ca0df9042cc4a586ee6d355737d6
SHA256 b16203f2f06d6b1d7eb85a086edaaa1298550fd50763d4498b93a0b208048857
CRC32 610db9e8
Example file location 1: C:\Windows\System32\