How do I get rid of this unwanted and inappropriate popup?

Question

I have written my own windows installer in C++ using Visual Studio 2010.  It works fine.  I recently added code to it so that the application installed by the installer is included in the Control Panel's "Uninstall Programs" list
and have wired everything up in my installer to perform the uninstall operation when passed the /U command line switch.  So far everything works fine.
I put a confirmation popup into the uninstallation code in the installer which comes up in the beginning when uninstall is selected within the "Uninstall Programs" control panel applet.  It's simply a Yes/No Message Box asking for a confirmation
of the uninstallation.  If I click 'Yes' to confirm the uninstallation request, everything works perfectly.
The problem occurs when I click 'No.'   If I click 'No', I get a popup stating that "This program might not have uninstalled correctly."
Does anyone know how I can prevent this 'Program Compatibility' dialog box from being issued by Windows (8.1) ?
Thanks in advance for any light you can provide.
Charles S. Cotton

Answer 1

Ok, this does turn out to be a windows version compatibility issue.  Once corrected, the problem disappears.
When an application is compiled by Visual Studio 2010 without an explicit compatibility manifest specified, it defaults to a compatibility level of Windows Vista.
The compatibility level can be seen for all running programs in resmon.exe, CPU tab.  Once there, right click any one of the column headers and choose "Select columns..."  Add the "Operating System Context" column.
Before adding the explicit manifest file, my installer program, compiled using Visual Studio 2010, showed an "Operating System Context" of "Windows Vista."
To add an explicit manifest file to the project, I first created a file that I called "Compatibility.manifest" (you may call it anything you wish) and put the following xml into the file (without the START and END indicators, shown below).  I
put the file into my 'Res' project subfolder:
<!-- START of Compatibility.manifest file -->
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
    <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
        <application>
            <!--The ID's below indicates application support for Windows 7, 8.0 and 8.1, in order. -->
            <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}" />
            <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}" />
            <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}" />
        </application>
    </compatibility>
</assembly>
<!-- END of Compatibility.manifest file -->
I included the supportedOS entries for Windows 7, 8.0 and 8.1, which appears to be necessary so that the application will work in all three of the OS's.
In the Properties Dialog for the Project, I added Compatibility.manifest to the project as shown here:
Note that the file pathname is relative to the project root (where the .vcxproj file resides).
After compiling, I tested the installer (both install and uninstall options through the Control Panel uninstall programs applet) for Windows 7, 8.1 and X (10).  Windows X doesn't seem to mind that the highest compatibility level is for Windows 8.1. 
When I discover what the compatibility GUID is for Windows X, I'll add that to Compatibility.manifest.
I provide this detail hoping that it may help someone else.
Charles S. Cotton