Notes about the C1 file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The C1 file type is primarily associated with 'Pov-ray for Windows' by Persistence of Vision Raytracer Pty Ltd.. An older Windows 3.1 file format, not generally used today.