program godot4.3 on Windows 7 not running

Hi, i programmed two programs with godot 4.3 C# (maybe youve seen in projects). Both run on my Windows 11 and on my old TestPC Windows 7 when i change from Forward+ to Compatibiliymode. But my new project does not run on Windows 7. It starts slowly without errormessage, shows the background and then nothing. i stopped all GD.Prints. What can be the problem with Windows 7 ? are the pictures too much for the memory? ok Microsoft stopped supporting but the other two programs run on it. how can i find the problem please?