Microsoft has updated their Windows Vista Upgrade Advisor with an enhanced its UI and device support in order to help users successfully determine which version of Windows Vista best suits their particular hardware configuration. If you've not heard of it, this app advises which parts of a system may need to be upgraded in order to support Windows Vista. If you're unsure whether your PC is prepared for the news OS or not, then this tool is a must.

link http://www.microsoft.com/windowsvista/getready/upgradeadvisor/default.mspx

ATI Graphics has also released their Windows Vista Readiness Advisor tool designed to assess the upgradeability of your computer to Windows Vista and can provide you with guidance for your computer’s unique configuration and the minimum, recommended, and optimal user experience.

link http://www.ati.com/technology/WindowsVista/GetReady.html