Fiddler crash when first installation

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Fiddler Classic Windows
Benjamin
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Benjamin asked on 21 Jul 2025, 01:57 PM

Hi

I recently downloaded the fiddler classic and it's crash when opening. And i already tried almost ways to fix it. And the log show that the MSVCR80.dll module error when the fiddler classic started.And  I Already reinstall the Microsoft Visual C++ 2005 Redistributable but it doesn't work. Could you please help to fix the crash?

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Nick Iliev
Telerik team
answered on 21 Jul 2025, 02:20 PM

Hey Benjamin,

 

Consider sharing and elaborating more to receive more tailored support from the Fiddler community. An error related to MSVCR80.dll module might be caused by several different factors, like older Windows OS versions, corrupted or missing files (e.g., due to malware). Refer to this thread for some possible approaches that you could take to scan and fix a potential problem with the DLL

https://learn.microsoft.com/en-us/answers/questions/2629218/msvcr80-dll-crashing-everything-on-most-machines 

 

Regards,
Nick Iliev
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Fiddler Classic Windows
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Benjamin
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Nick Iliev
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