For your specific installer , here are the most relevant official and community papers/documents:
Many industrial Windows machines run 32-bit operating systems because their proprietary hardware drivers (for CNC machines, medical devices, or cash registers) were never updated to 64-bit. Qt 6 dropped official 32-bit Windows support entirely. If you need to support a Pentium 4 or Celeron machine, 5.15.2 is your only stable path. qt-opensource-windows-x86-5.15.2.exe
In Qt Creator:
In this article, we will dissect everything about qt-opensource-windows-x86-5.15.2.exe : what it is, why it matters, how to install it, common pitfalls, and whether you should use it for new projects in 2025 and beyond. For your specific installer , here are the