title: Windows .exe needs to run in "XP Compatibility Mode" on some PCs
body: <p>I have an application which is built using Qt framework, compiled using qmake in mingw environment, and then packaged for Windows using Inno Installer.</p>
  
  <p>We have a number of reports of the installed .exe requiring "XP Compatibility Mode" or "Administrator privileges" to run on newer versions of Windows.</p>
  
  <p>Unfortunately we can't recreate this, despite testing on a number of 32-bit and 64-bit platforms, but the number of reports we have suggest the problem is valid.</p>
  
  <p>What could be causing this? The app is quite simple and should not require any administrator privileges to run.</p>
  
  <p>How can I debug the issue, and build a fully distributable .exe?</p>