Fiddler Classic doesn't appear to properly install or run on my Win 7 PC

[Sam]

Hi,

  I downloaded Fiddler Classic v5.0.20202.18177.  When I attempt to install it, it stops working at the Setup Helper step.  A message appears that reads "Fiddler.SetupHelper has stopped working".  If I click 'Close Program', a warning dialog appears that reads "error code: 255.  Please add Progress Telerik Fiddler's installation directory to your PATH environment variable if you want to be able to start Progress Telerik Fiddler from the Windows' Run dialog."

  After closing that dialog, Fiddler appears to finish installing.  However, although it is listed in the Control Panel's installed programs, it does not start up after I click the application executable.

  I have tried adding the installation directory to my PATH environment variable and restarting my PC, but it does the same thing.  I have tried uninstalling it, and reinstalling, but to no avail.  I have tried turning off my firewall, uninstalling it, and installing it, all while the installation directory was added to my PATH environment variable.  I have tried installing it to my Desktop instead of the default directory.  I have tried fresh downloads of Fiddler Classic.  I have tried installing it while my anti-virus is disabled.  At this point, I'm not sure what else to try; any help would greatly be appreciated.  I'd really like to give this program a go, because I've heard good things about it.  I'm including the installation details below, as well as several screenshots.

  Thanks in advance for your help!

 

 

Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler
No older version of Progress Telerik Fiddler was found.
.NETv4 Framework Key found.
Compatible .NET Framework/Service Pack found.
Installing Progress Telerik Fiddler
Extract: Fiddler.exe
Extract: Fiddler.exe.config
Extract: Fiddler.pdb
Extract: SetupHelper
Extract: TrustCert.exe
Extract: TrustCert.pdb
Installing Dependencies...
Extract: Be.Windows.Forms.HexBox.dll
Extract: Analytics.dll
Extract: Analytics.pdb
Extract: GA.Analytics.Monitor.dll
Extract: GA.Analytics.Monitor.pdb
Extract: Newtonsoft.Json.dll
Extract: Xceed.FileSystem.v5.4.dll
Extract: Xceed.Zip.v5.4.dll
Extract: Xceed.Compression.v5.4.dll
Extract: Xceed.Compression.Formats.v5.4.dll
Extract: App.ico
Extract: Countdown.wav
Extract: LoadScript.wav
Extract: LoadScriptError.wav
Extract: Screenshot.wav
Extract: credits.txt
Extract: saz.ico
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\ResponseTemplates
Extract: 200_FiddlerGif.dat
Extract: 200_SimpleHTML.dat
Extract: 200_TransPixel.dat
Extract: 204_NoContent.dat
Extract: 302_Redirect.dat
Extract: 303_RedirectWithGet.dat
Extract: 304_NotModified.dat
Extract: 307_RedirectWithMethod.dat
Extract: 401_AuthBasic.dat
Extract: 401_AuthDigest.dat
Extract: 403_AuthDeny.dat
Extract: 404_Plain.dat
Extract: 407_ProxyAuthBasic.dat
Extract: 502_Unreachable.dat
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\Scripts
Extract: SampleRules.cs
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\Tools
Extract: Brotli.exe
Extract: JXR2PNG.exe
Extract: JXR2PNG.exe.config
Extract: Zopfli.exe
Extract: dwebp.exe
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler
Extract: license.txt
Extract: makecert.exe
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\Scripts
Extract: SampleRules.js
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler
Extract: ExecAction.exe
Extract: ForceCPU.exe
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler
Installing NetworkConnections...
Extract: Telerik.NetworkConnections.dll
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\Plugins\NetworkConnections
Extract: Telerik.NetworkConnections.Windows.dll
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\Inspectors
Installing Progress Telerik Fiddler inspectors
Extract: Standard.dll
Extract: SyntaxView.dll
Extract: QWhale.Common.dll
Extract: QWhale.Editor.dll
Extract: QWhale.Syntax.dll
Extract: QWhale.Syntax.Schemes.dll
Installing tools...
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\Tools
Extract: PngDistill.exe
Extract: PngDistill.pdb
Installing FiddlerExtensions...
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\Scripts
Extract: SimpleFilter.dll
Extract: SimpleFilter.pdb
Extract: Timeline.dll
Extract: Timeline.pdb
Extract: RulesTab2.dll
Extract: QWhale.Common.dll
Extract: QWhale.Editor.dll
Extract: QWhale.Syntax.dll
Extract: QWhale.Syntax.Parsers.dll
Installing Fiddler Orchestra addon...
Extract: FiddlerOrchestra.Addon.dll
Extract: FiddlerOrchestra.Addon.pdb
Extract: FiddlerOrchestra.Connection.dll
Extract: FiddlerOrchestra.Protocol.dll
Extract: FiddlerOrchestra.Utilities.dll
Extract: netstandard.dll
Installing Fiddler Script Editor...
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\ScriptEditor
Extract: FSE2.exe
Extract: FSE2.exe.config
Extract: QWhale.Common.dll
Extract: QWhale.Editor.dll
Extract: QWhale.Syntax.dll
Extract: QWhale.Syntax.Parsers.dll
Extract: Analytics.dll
Extract: Analytics.pdb
Extract: GA.Analytics.Monitor.dll
Extract: GA.Analytics.Monitor.pdb
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler\ImportExport
Extract: BasicFormats.dll
Extract: BasicFormats.pdb
Extract: VSWebTestExport.dll
Extract: VSWebTestExport.pdb
Write x64 HKLM Keys
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler
Create shortcut: C:\Users\Sam\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Fiddler 4.lnk
Create shortcut: C:\Users\Sam\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Fiddler ScriptEditor.lnk
Registering Windows Firewall Exception for inbound traffic...
ExecShell: C:\Windows\system32\netsh.exe
ExecShell: C:\Windows\system32\netsh.exe
Invoking DotNet4 64bit NGEN
ExecShell: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe
ExecShell: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe
Execute: "C:\Users\Sam\AppData\Local\Programs\Fiddler\SetupHelper" /a "C:\Users\Sam\AppData\Local\Programs\Fiddler"
Output folder: C:\Users\Sam\AppData\Local\Programs\Fiddler
Extract: uninst.exe
Refreshing icons...
Completed

[Nick Iliev]

Hi Sam,

 

The error looks OS generic and related to versioning of the .NET framework and specifics with older Windows versions. We had experienced a similar issue on our side (with Fiddler Everywhere) and as a solution, the machine that ran Windows 7 was updated to use the latest KBs. Please try to update your Windows 7 with all the latest patches especially those related to fixing/updating the .NET framework for Windows 7.

 

Regards,
Nick Iliev
Progress Telerik