Repair DLL Errors: FiddlerCore.dll Download and Update

Last Updated: 11/27/2023
[Time to Read: ~3-5 minutes]

FiddlerCore files, such as FiddlerCore.dll, are considered a type of Win32 DLL (Dynamic link library) file. They are associated with the DLL file extension, developed by Vitzo for FiddlerCore.

FiddlerCore.dll was first released in the Windows 10 Operating System on 05/14/2017 with VDownloader 4.5.2737. According to our records, this is the primary and most recent file release from Vitzo.

Please continue reading to find your correct FiddlerCore.dll file version download (free), detailed file information, and DLL file troubleshooting instructions.

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File Overview


General Information
File Name: FiddlerCore.dll
File Extension: DLL file extension
Description: FiddlerCore
Object File Type: Dynamic link library
Comments: Core HTTP(S) Proxy Engine
File Operating System: Win32
MIME Type: application/octet-stream
User Popularity Rating:
 
Developer and Software Information
Software Developer: Telerik
Software Program: FiddlerCore
Legal Copyright: Copyright ©2013 Telerik. All Rights Reserved.
File Details
Character Set: Unicode
Language Code: Neutral
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x544ae
Code Size: 337408
Assembly Version: 2.4.4.6


What are FiddlerCore.dll Error Messages?


Dynamic Link Library FiddlerCore.dll Errors

FiddlerCore.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like FiddlerCore.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like onenoteim.exe - to follow. These files were created so that multiple programs (eg. VDownloader) could share the same FiddlerCore.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 FiddlerCore.dll is attempted to be loaded either when VDownloader is starting up, or in some cases already running. Some of the most common FiddlerCore.dll errors include:

Your FiddlerCore.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with VDownloader), or deleted by a malware infection. Furthermore, FiddlerCore.dll file corruption could be caused from a power outage when loading VDownloader, system crash while loading FiddlerCore.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.



How to Fix FiddlerCore.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 FiddlerCore.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 FiddlerCore.dll error, please proceed to the Step 2 below.

Step 2: If recently installed VDownloader (or related software), uninstall then try reinstalling VDownloader software.

You can uninstall VDownloader 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 VDownloader 4.5.2737 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall VDownloader software.

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

VDownloader 4.5.2737

Vitzo

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 FiddlerCore.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 FiddlerCore.dll error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.



If Those Steps Fail: Download and Replace Your FiddlerCore.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 FiddlerCore.dll file version. We maintain a comprehensive database of 100% malware-free FiddlerCore.dll files for every applicable version of VDownloader. 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 FiddlerCore.dll Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate VDownloader folder location:
    Windows 10: C:\Program Files\VDownloader\
  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 FiddlerCore.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.



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


CAUTION : We strongly advise against downloading and copying FiddlerCore.dll to your appropriate Windows system directory. Vitzo typically does not release VDownloader 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 FiddlerCore.dll and all other DLL files for VDownloader. 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


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DLL Files Related to FiddlerCore.dll

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FileSyncFALWB.dll Microsoft OneDriveFile Sync FAL WB Microsoft OneDrive (19.174.0902.0013) 335480 C:\Documents and Settings\Bill\Local Settings\A...
SQLite.Interop.dll System.Data.SQLite Interop Assembly System.Data.SQLite (1.0.102.0) 1425920 C:\Program Files\Common Files\System\MSMAPI\1033\
api-ms-win-core-timezo... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 18552 C:\Windows\System32\LogFiles\WMI\RtBackup\
api-ms-win-core-memory... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 18544 C:\$WINDOWS.~BT\Sources\Boot\EFI\hr-HR\
clrcompression.dll Dynamic Link Library Microsoft® .NET Framework (4.6.27129.01 @BuiltBy: dlab14-DDVSOWINAGE079 @Branch: release/uwp6.2 @SrcCode: https://github.com/dotnet/corefx/tree/be5e8852108ada66cdc0013694b7abcd1bbd9704) 71216 C:\Windows\System32\DriverStore\FileRepository\...

Other Files Related to FiddlerCore.dll

File Name Description Software Program (Version) File Size (bytes) File Location
setupact.log Log VDownloader 4.5.2737 62830 C:\Windows\Panther\UnattendGC\
setupact.log Log VDownloader 4.5.2737 16387 C:\Windows\System32\Sysprep\Panther\
diagwrn.xml Extensible Markup Language VDownloader 4.5.2737 46588 C:\Windows\Panther\UnattendGC\
diagerr.xml Extensible Markup Language VDownloader 4.5.2737 5718 C:\Windows\System32\Sysprep\Panther\
EtwRTEventLog-Applicat... Microsoft Event Trace Log VDownloader 4.5.2737 2048 C:\Windows\System32\LogFiles\WMI\RtBackup\


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