System requirements of Windows 7

If you want to use Windows 7 on your PC, here's what it takes:

1.     1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
2.     1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
3.     DirectX 9 graphics device with WDDM 1.0 or higher driver
4.     16 GB available hard disk space (32-bit) o 20 GB (64-bit)

Extra requirements to use certain features:

1.     Internet access (fees may apply)
2.     Depending on resolution, video playback may require additional memory and        advanced graphics hardware
3.      Some games and programs might require a graphics card compatible with DirectX 10 or higher for optimal performance     
4.      For some Windows Media Center functionality a TV tuner and additional hardware may be required
5.      Windows Touch and Tablet PCs require specific hardware   
6.      HomeGroup requires a network and PCs running Windows 7    
7.      DVD/CD authoring requires a compatible optical drive  
8.      BitLocker requires Trusted Platform Module (TPM) 1.2  
9.      BitLocker To Go requires a USB flash drive   
10.       Windows XP Mode requires an additional 1 GB of RAM and an additional 15 GB of   available  hard disk space.   
11.      Music and sound require audio output                   

Product functionality and graphics based on your system configuration. Some features may need advanced or extra hardware.