Windowsxp to Vista

If I have Windows xp installed how can I upgrade to Windows Vista Upgrade?

 

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 (fees may apply)

Additional requirements
Actual requirements and product functionality may vary based on your system configuration. Windows Vista Upgrade Advisor can help you determine which features and edition of Windows Vista will run on your computer.

While all editions of Windows Vista can support multiple core CPUs, only Windows Vista Business, Ultimate, and Enterprise can support dual processors.

Home Premium / Ultimate
TV tuner card required for TV functionality (compatible remote control optional).

Home Premium / Business / Ultimate
Windows Tablet and Touch Technology requires a Tablet PC or a touch screen.

Ultimate
Windows BitLocker Drive Encryption requires a USB Flash Drive and a system with a TPM 1.2 chip

Does your machine meet these requirements. And why would you want to do this? Vista, esp. from upgrades, is a little buggy. XP with SP3 is still a very good OS>