Hardware Requirements

Architecture: 32-bit
Processor: 1 GHz
Memory: (RAM) 1GB
Graphics Card: DirectX 9 Graphics Processor With WDDM Driver Model 1.0 (For Aero)
HDD: Free Space 16 GB Of Free Disk Space
Optical Drive: DVD drive (only to install from DVD/CD Media)
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Hardware Requirements

Architecture: 64-bit
Processor: 1 GHz
Memory: (RAM) 2GB
Graphics Card: DirectX 9 Graphics Processor With WDDM Driver Model 1.0 (For Aero)
HDD: Free Space 20 GB Of Free Disk Space
Optical Drive: DVD drive (only to install from DVD/CD Media)
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Physical Memory (RAM) Limits In 32-bit Windows

Windows 7 Ultimate: 4GB
Windows 7 Enterprise: 4GB
Windows 7 Professional: 4GB
Windows 7 Home Premium: 4GB
Windows 7 Home Basic: 4GB
Windows 7 Starter: 2GB
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Physical Memory (RAM) Limit in 64-bit Windows

Windows 7 Ultimate: 192GB
Windows 7 Enterprise: 192GB
Windows 7 Professional: 192GB
Windows 7 Home Premium: 16GB
Windows 7 Home Basic: 8GB
Windows 7 Starter: N/A