Here’s what happens
I open the installer, choose the packages I want(I choose to install some 1.7 GB of components), everything goes well.
But then when I click on the Install button, and Qt installer crashes! And by crashes I mean it crashes, Windows DOES NOT tell me it is not responding. The window just gets invisible from the taskbar.
There also is no possibility that it is installing in the background, as I waited for approx. 5 mins, and when I checked in the folder where I was going to install it, I didn’t find a SINGLE component installed!
How to solve that?
I asked some questions earlier because a person needs more information. It also depends on what compiler you have. There are many many known issues with Qt 6.x. The default kit doesn't work with MSVC2019 https://forum.qt.io/topic/120357/wrong-kit-for-qt-6-0-0-msvc2019-64bit/5 Qt 6.0 has install issues with GLib 6 https://youtu.be/IZy6FMQlaNg There also appears to be significant problems with OpenGL. https://github.com/opencv/opencv/issues/20499
People seem to still be able to get off-line installers, and, as this French typing person found out, you have to be careful because it appears there are some 32-bit Windows kits.
https://forum.qt.io/topic/123027/installation-qt6-on-windows/7
If you try running them on a 64-bit Windows 10, they crash.
If this doesn't answer your question, you need to supply