In order for you to play CLANNAD on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows Vista or higher
Processor (CPU):
1.2Ghz
Memory (RAM):
1 GB RAM
Graphics Card:
640x480
DirectX:
Version 9.0c
Storage:
7 GB available space
Sound Card:
DirectSound-compatible sound card
In order to play CLANNAD on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
OS *:
Windows 7/8.1/10
Processor (CPU):
1.2Ghz
Memory (RAM):
2 GB RAM
Graphics Card:
1280x960
DirectX:
Version 9.0c
Storage:
7 GB available space
Sound Card:
DirectSound-compatible sound card