I found a solution that fixes the problem, not sure if it's just a workaround or a 'proper' solution as I don't know much about Windows specific programming.

I added the <compatibility> section of the manifest file found here:
https://msdn.microsoft.com/windows/compatibility/operating-system-version-changes-in-windows-8-1
to the myldr/winres/pp.manifest file in the PAR-Packer-1.041 source, and then rebuilt and reinstalled PAR-Packer from the modified source.

Any exe built with this modified PAR-Packer displays the Windows version info correctly (tested on Win 10 and 8.1).

For the record, this is the section I added to the pp.manifest file:

    <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
        <application>
            <!-- Windows 8.1 -->
            <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
            <!-- Windows Vista -->
            <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
            <!-- Windows 7 -->
            <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
            <!-- Windows 8 -->
            <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
            <!-- Windows 10 -->
            <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
        </application>
    </compatibility>

[download]

In reply to Re: why does par packer cause incorrect Perl-Tk server() output? by perltux
in thread why does par packer cause incorrect Perl-Tk server() output? by perltux

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