If you want to run Windows 7 on your PC, here's what it takes:
1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor* 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit) 16 GB available hard disk space (32-bit) or 20 GB (64-bit) DirectX 9 graphics device with WDDM 1.0 or higher driver
Additional requirements to use certain features:
Internet access Depending on resolution, video playback may require additional memory and advanced graphics hardware Some games and programs might require a graphics card compatible with DirectX 10 or higher for optimal performance For some Windows Media Center functionality a TV tuner and additional hardware may be required Windows Touch and Tablet PCs require specific hardware HomeGroup requires a network and PCs running Windows 7 DVD/CD authoring requires a compatible optical drive BitLocker requires Trusted Platform Module (TPM) 1.2 BitLocker To Go requires a USB flash drive Windows XP Mode requires an additional 1 GB of RAM and an additional 15 GB of available hard disk space. Music and sound require audio output Product functionality and graphics may vary based on your system configuration. Some features may require advanced or additional hardware.