In order for you to play Dreamfall: The Longest Journey on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows XP (with service pack 2) only
Processor (CPU):
Intel Pentium 4 1.6 GHz or AMD Sempron 2800+ or higher required. Intel Pentium 4 2.5 GHz or AMD Athlon XP 3500+ Recommended
Memory (RAM):
512 MB RAM
Graphics Card:
3D Hardware Accelerator Card Required: 100% DirectX 9.0c compatible 128 MB with latest drivers.
Hard Drive:
7 GB free disk space
Sound:
DirectX 9.0c compatible sound