FiddlerCore - Windows 10 Apps Not Working

2 posts, 0 answers
  1. kris
    kris avatar
    8 posts
    Member since:
    Nov 2015

    Posted 01 Nov 2015 Link to this post

    I apologize if this question has been answered in another thread -- but I haven't seemed to find the answer yet.

    I am attempting to write an app using FiddlerCore.  However, while my app is running, ​at least one Windows 10 app (News) does not respond.  By that I mean ​it tries to retrieve data ​but instead returns a "Service is Not Available" message.  The same thing happens if I try to use the standard Fiddler app. 

    However as soon as I disable the Proxy server in Windows, all is well again.  So I'm assuming this has something to do with it, I'm just not sure how to go about fixing it.  Any help would be greatly appreciated.  Thanks!

  2. Eric Lawrence
    Eric Lawrence avatar
    833 posts

    Posted 02 Nov 2015 Link to this post

    Hi, Kris--

    To use Fiddler with Windows 8+ "Metro"/"Immersive" applications, you must do two things:

    1> When prompted to trust the Fiddler Root Certificate machine-wide, accept that prompt (Fiddler) or install the certificate in the CurrentMachine store yourself (FiddlerCore).

    2> You must exempt the AppContainers from Loopback restrictions; see or the WinConfig button on Fiddler's toolbar.

    Eric Lawrence
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