In order for you to play Chains on Windows with minimal graphics settings, your computer must meet the following requirements
Supported OS:
Windows® XP or Windows® Vista
Processor:
1 GHz Processor
Memory:
256 MB RAM
Graphics:
DirectX compatible 128 MB graphics card
DirectX Version:
DirectX 9.0c
Sound:
DirectX compatible audio card
Hard Drive:
30 MB of hard disk space
Input:
Keyboard and Mouse