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powershell.exe -Command - is broken on Windows 10 14393

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I wrote a post that includes the source for a tiny C# program that demonstrates that trying to launch powershell.exe with its "-Command -" parameter to get the script from StdIn no longer works after installing the Anniversary Update on Windows 10. Does not happen on Server 2016 TP5. I can duplicate the details here if that makes more sense.

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    _dandy_ shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

    The fix for this issue has been backported from 6.0-alpha to 5.1 in the latest fully patched Win10 Anniversary Update. This repro should show powershell.exe -Command with -RedirectStandardInput working, and also demonstrates the version of PowerShell you should be on.

    C:\temp> set-content .\in.txt ‘$psversiontable’ -Encoding ascii
    >> Start-Process -FilePath ‘powershell.exe’ -ArgumentList “-Command -” -RedirectStandardOutput "out.txt
    " -RedirectStandardInput “in.txt”
    C:\temp> cat .\out.txt

    Name Value
    -- -
    PSVersion 5.1.14393.206
    PSEdition Desktop
    PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
    BuildVersion 10.0.14393.206
    CLRVersion 4.0.30319.42000
    WSManStackVersion 3.0
    PSRemotingProtocolVersion 2.3

    Note: if your problems aren’t fixed, and you’re on this version of PowerShell 5.1 or greater, please file another issue here on UserVoice to address it.



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      • Mykola Gorbarov commented  ·   ·  Flag as inappropriate

        Dear Joey,

        This issue is still possible to reproduce with PSVersion: 5.1.14393.206:
        Windows PowerShell transcript start
        Start time: 20161123103734
        Username: blabla
        RunAs User: blabla
        Machine: name (Microsoft Windows NT 10.0.14393.0)
        Host Application: powershell -command -
        Process ID: 5192
        PSVersion: 5.1.14393.206
        PSEdition: Desktop
        PSCompatibleVersions: 1.0, 2.0, 3.0, 4.0, 5.0, 5.1.14393.206
        BuildVersion: 10.0.14393.206
        CLRVersion: 4.0.30319.42000
        WSManStackVersion: 3.0
        PSRemotingProtocolVersion: 2.3

        Can You review fix?

      • Florian Lusch commented  ·   ·  Flag as inappropriate

        @Joey Aiello
        Could you pleae tell us, which KB we have to install to fix this error in Windows 10?

      • Glenn Sarti commented  ·   ·  Flag as inappropriate

        Zachary, Thanks for updating this issue. Will this fix be backported to 5.1 as that repo is for Powershell 6.0?

      • _dandy_ commented  ·   ·  Flag as inappropriate

        > We would love to see this fix backported to the PowerShell 5.1 Anniversary edition

        I can't see how anyone could get away with not doing that.

      • Ethan Brown commented  ·   ·  Flag as inappropriate

        Our assumption is that this will also impact the latest builds of Server 2016, which build on PowerShell 5.1.

      • Mike Sargent commented  ·   ·  Flag as inappropriate

        One of the devs at my company is fighting with this issue. Clearly, something got broken with the Anniversary Update and it needs to be fixed!

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