In order for you to play LEGO Harry Potter: Years 5-7 on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows XP SP3 Vista or Windows 7
Processor (CPU):
Dual Core CPU @ 2GHz (Pentium D or better)
Memory (RAM):
1GB RAM
Hard Disk Space:
8.5 GB free HDD space
Video Card:
Shader Model 3 graphics card (NVIDIA GeForce 6800, 7800, 8xxx or better; ATI X1950 or better)