As promised information re Windows Vista’s computer hardware requirements
Windows Vista minimum supported system requirements
Home Basic / Home Premium / Business / Ultimate
800 MHz processor and 512 MB of system memory
20 GB hard drive with at least 15 GB of available space
Support for Super VGA graphics
CD-ROM drive
Windows Vista recommended system requirements
Home Basic
1 GHz 32-bit (x86) or 64-bit (x64) processor
512 MB of system memory
20 GB hard drive with at least 15 GB of available space
Support for DirectX 9 graphics and 32 MB of graphics memory
DVD-ROM drive
Audio Output
Internet access
Home Premium / Business / Ultimate
1 GHz 32-bit (x86) or 64-bit (x64) processor
1 GB of system memory
40 GB hard drive with at least 15 GB of available space
Support for DirectX 9 graphics with:
WDDM Driver
128 MB of graphics memory (minimum)
Pixel Shader 2.0 in hardware
32 bits per pixel
DVD-ROM drive
Audio Output
Internet access
All the above information was taken from Microsoft’s web site as of 02/03/07
http://www.microsoft.com/windows/products/windowsvista/editions/systemrequirements.mspx
Try the Windows Upgrade Advisor
http://www.microsoft.com/windows/products/windowsvista/buyorupgrade/upgradeadvisor.mspx
