As a matter of fact, the behavior, I described for the first Win 7 OS is a crash similar to the bug AppStu-000081 reported under https://earlyadopter.esri.com/project/feedback/view.html?cap=5E0BCBB972004AC7A67F93442531EF0F&uf=A48...
So that problem might be not resolved up to now.
The Visual Studio Debugger gives me the hint, that there is a access violation in AppBuider.exe concerning the Qt5Quick.dll.
Following the information, provided on Qt for Windows - Requirements | Qt 5.5 I supposed, that it could be a problem of Open GL or Direct X - Support. But this idea might be wrong, because there is a graphics driver that provides OpenGL 2.1 on my machine.
I encountered the behaviour, which I described above for the second Windows 7, as well with a virtual Windows 8.1 OS. Here I don't have a crash, but the graphics of AppStudio are fare to grainy - it's impossible to use it.
Qt Creator is working fine wth both virtual machines (Win 7 + Win 8).
So I really wonder if others encountered these problems as well.
Are there any hidden requirements for the install of AppStudio on Windows systems?
Whats the technology behind AppStudio? Is it programmed with Qt?