Windows Phone 8 SDK: A required certificate is not within its validity period when verifying against the current system clock or the timestamp in the signed file.


  • Peace be upon youو

    I have VS2012 Ultimate installed with Update 3.

    When I tried to install Windows Phone 8 SDK, I got this error:

    The error

    I tried to Unregister-WindowsDeveloperLicense from Power Shell and get a new  one and also this solution Event ID 4107 or Event ID 11 , but all  fail!

    What shall I do?!
    Sunday, October 13, 2013 8:42 AM


  • I'm faced similar issue. Read, this process worked for me.


    Thanks, Barkz

    • Marked as answer by Yasser Rabee Monday, October 14, 2013 10:39 AM
    Sunday, October 13, 2013 10:11 PM

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