I have installed Flutter on Windows and checked all is ok using flutter doctor. I imported the Flutter plugin.
Now, when I try to create a new Flutter app via Anroid
For windows 10 there is couple of solution here, I am sharing with here which is working for me.
1. Set Flutter SDK path is present in AS Settings . Settings > Languages & Settings > Flutter > Flutter SDK Path
2. Run Android Studio/IntelliJ in administrator mode
3. Your project location path folder name is valid Dart package name.