Recommended minimum hardware requirement for Window 7

Win7 Starter, Home basic, Home Premium requires same hardware. 

• Processor 1 GHZ
• Ram 512 MB
• Hard disk 32 bit 16 GB
• Hard disk 64 bit 20 GB

Win7 Professional, Enterprise, Ultimate requires same hardware

• Processor 1 GHZ
• Ram 1 GB
• Hard disk 32 bit 40 GB
• Hard disk 64 bit 60 GB
• 256 MB VGA card