The UI is not rendered, however, it's possible to interact with the app(cursor changes on button/textfield hovering), you can navigate between screens, execute dart code without problems.

Reproducible on Windows 7, 8, 8.1:
• Steps to reproduce: install official Windows 7 build 6.1.7601.17514 or Windows 8 and launch default flutter application(official flutter example app).
• FlutterError.onError and runZonedGuarded do not catch anything.
• Can be fixed by installing .NET Framework 4.8(This fix works only for Windows 7 because Windows 8/8.1 does not support such .NET Framework version)

Tested on Flutter 2.2.2, 2.2.3, 2.5.3 from the stable channel.