It's actually normal for programs installed on the E: drive to still have some files on the C: drive.
Many programs place certain essential files, such as configuration settings, logs, and user data, on the C: drive, regardless of where the main program is installed. This is because the C: drive is typically where Windows stores critical system and user-related information.
Some applications may also install shared libraries or dependencies on the C: drive (like files in the ProgramData, AppData, or Documents folders), as these are required for system-wide access.
This behavior is standard across Windows, and there’s usually no need for concern as long as the main program files are stored on your chosen E: drive.
If you have any other questions or need further clarification, feel free to reach out—I'm here to assist!
Best regards,
Nals