Windows 10: System Requirements

Windows 10 System Requirements :

• OS: Latest version of either Windows 7 SP1 or Windows 8.1 Update.
  • To determine which version you are running
  • To download the latest version  Windows 7 SP1 or Windows 8.1 Update
• Processor: 1 gigahertz (GHz) or faster processor or SoC
• Ram: 1 gigabyte (GB) (for 32-bit) or 2 GB (for 64-bit)
• Hard disk space: 16 GB (for 32-bit) OS 20 GB (for 64-bit) OS
• Graphics card: DirectX 9 or later with WDDM 1.0 driver
• Display: 800x600
   

For more information concerning system requirements for the specific features available in Windows 10, visit the main Microsoft site.
 

Referenced from: Windows.microsoft.com