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
Microsoft Windows 7 (Seven) Ultimate Edition 32/64-bit ACTiVATED English | DVD ISO | Bootable | Pre-activated | 3.47 GB