A Windows Vista Capable PC includes at least:
* A modern processor (at least 800MHz).
* 512 MB of system memory.
* A graphics processor that is DirectX 9 capable.
A Windows Vista Premium Ready PC includes at least:
* 1 GHz 32-bit (x86) or 64-bit (x64) processor).
* 1 GB of system memory.
* Support for DirectX 9 graphics with a WDDM driver, 128 MB of graphics memory (minimum), Pixel Shader 2.0 and 32 bits per pixel.
* 40 GB of hard drive capacity with 15 GB free space.
* DVD-ROM Drive.
* Audio output capability.
* Internet access capability.
The Windows Vista Upgrade Advisor will help you to determine if your Windows XP-based PC can run Windows Vista. You can also use the Upgrade Advisor to determine if your Windows Vista-based PC is ready for an upgrade to a more powerful edition of Windows Vista.
Download Windows Vista Upgrade Advisor