TechyGeeksHome Cisco VPN Client Fix for Windows 8.1 and 10 DLL DU.dll

How to Fix Issues with DU.dll (Free Download)

Last Updated: 11/30/2023
[Time Needed for Reading: ~4-6 minutes]

Dynamic Update files, such as DU.dll, are considered a type of Win64 DLL (Executable application) file. They are associated with the DLL file extension, developed by TechyGeeksHome for Microsoft® Windows® Operating System.

DU.dll was first released for Windows 7 Operating System on 07/22/2009 with Windows 7. The most recent release for Cisco VPN Client Fix for Windows 8.1 and 10 3.6 launched on 08/02/2018 [version 10.0.18362.1 (WinBuild.160101.0800) release]. DU.dll is found in Windows 10, Windows 8.1, and Windows 8.

In this short article, you will discover detailed file information, steps for troubleshooting DLL file problems with DU.dll, and list of free downloads for every version that exists in our comprehensive file directory.

File Analysis Provided by Jason Geater (Author)


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File Overview


General Information ✻
File Name: DU.dll
File Extension: DLL file extension
Description: Dynamic Update
Object File Type: Executable application
File Operating System: Windows NT 32-bit
MIME Type: application/octet-stream
User Popularity Rating:
 
Developer and Software Information
Software Developer: Microsoft Corporation
Software Program: Microsoft® Windows® Operating System
Legal Copyright: © Microsoft Corporation. All rights reserved.
File Details
Character Set: Unicode
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x137b0
Code Size: 82432
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What are DU.dll Error Messages?


Dynamic Link Library DU.dll Errors

DU.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like DU.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like Setup.exe - to follow. These files were created so that multiple programs (eg. Cisco VPN Client Fix for Windows 8.1 and 10) could share the same DU.dll file, saving valuable memory allocation, therefore making your computer run more efficiently.

Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DLL file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when DU.dll is attempted to be loaded either when Cisco VPN Client Fix for Windows 8.1 and 10 is starting up, or in some cases already running. Some of the most common DU.dll errors include:

Your DU.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Cisco VPN Client Fix for Windows 8.1 and 10), or deleted by a malware infection. Furthermore, DU.dll file corruption could be caused from a power outage when loading Cisco VPN Client Fix for Windows 8.1 and 10, system crash while loading DU.dll, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

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How to Fix DU.dll Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your DU.dll issue. These troubleshooting steps are listed in the recommended order of execution.


Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the DU.dll error, please proceed to the Step 2 below.

Step 2: If recently installed Cisco VPN Client Fix for Windows 8.1 and 10 (or related software), uninstall then try reinstalling Cisco VPN Client Fix for Windows 8.1 and 10 software.

You can uninstall Cisco VPN Client Fix for Windows 8.1 and 10 software by following these instructions (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for Cisco VPN Client Fix for Windows 8.1 and 10 3.6 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Cisco VPN Client Fix for Windows 8.1 and 10 software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Cisco VPN Client Fix for Windows 8.1 and 10 3.6

TechyGeeksHome

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many DU.dll error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the DU.dll error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your DU.dll File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate DU.dll file version. We maintain a comprehensive database of 100% malware-free DU.dll files for every applicable version of Cisco VPN Client Fix for Windows 8.1 and 10. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download DU.dll Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Cisco VPN Client Fix for Windows 8.1 and 10 folder location:
    Windows 7: C:\WINDOWS\system32\oobe\
    Windows 8: C:\WINDOWS\system32\oobe\
    Windows 8.1: C:\WINDOWS\system32\oobe\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Show 102 more directories +
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
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    Windows 10: C:\$WINDOWS.~BT\Sources\
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    Windows 10: C:\$WINDOWS.~BT\Sources\
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    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
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    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\Autodesk\WI\Autodesk AutoCAD 2020\x64\acad\PF\Root\IVS\Bin\
    Windows 10: C:\Program Files\Autodesk\AutoCAD 2020\Inventor Server\Bin\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
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    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
    Windows 10: C:\$WINDOWS.~BT\Sources\
  4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.


GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve DU.dll problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download DU.dll Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying DU.dll to your appropriate Windows system directory. TechyGeeksHome typically does not release Cisco VPN Client Fix for Windows 8.1 and 10 DLL files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing DU.dll and all other DLL files for Cisco VPN Client Fix for Windows 8.1 and 10. An incorrectly installed DLL file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10
Windows 8.1
Windows 8
Windows 7
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Files Related to DU.dll


DLL Files Related to DU.dll

File Name Description Software Program (Version) File Size (bytes) File Location
System.Data.Common.dll System.Data.Common Microsoft® .NET Framework (1.0.24212.01. Commit Hash: 9688ddbb62c04189cac4c4a06e31e93377dccd41) 69480 C:\Program Files (x86)\Common Files\microsoft s...
diagtrack.dll Microsoft Windows Diagnostics Tracking Microsoft® Windows® Operating System (10.0.10586.0) 1365856 C:\Windows\assembly\GAC_MSIL\System.Management....
wdsclientapi.dll Windows Deployment Services Client API Library Microsoft® Windows® Operating System (10.0.18362.1) 298136 C:\Program Files (x86)\Common Files\microsoft s...
System.ComponentModel.... System.ComponentModel.DataAnnotations.dll Microsoft® .NET Framework (4.6.24301.0) 21936 C:\Windows\inf\WmiApRpl\0009\
System.Threading.Tasks... System.Threading.Tasks Microsoft® .NET Framework (1.0.24212.01. Commit Hash: 9688ddbb62c04189cac4c4a06e31e93377dccd41) 26488 C:\Windows\System32\DriverStore\FileRepository\...

Other Files Related to DU.dll

File Name Description Software Program (Version) File Size (bytes) File Location
setupact.log Log Cisco VPN Client Fix for Windows 8.1 and 10 3.6 202346 C:\$WINDOWS.~BT\Sources\Panther\
netrass.PNF Precompiled INF Cisco VPN Client Fix for Windows 8.1 and 10 3.6 8012 C:\Windows\System32\DriverStore\FileRepository\...
setupapi.dev.log Log Cisco VPN Client Fix for Windows 8.1 and 10 3.6 690878 C:\Windows\inf\
netnwifi.PNF Precompiled INF Cisco VPN Client Fix for Windows 8.1 and 10 3.6 6148 C:\Windows\System32\DriverStore\FileRepository\...
api-ms-win-core-sysinf... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 12136 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...


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