Considering installing or upgrading to Windows 7? If so, here is a link to Microsoft showing the system requirements.
http://windows.microsoft.com/en-au/windows7/products/system-requirements
In basic form, here are those requirements.
- 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
