One of the biggest issues that a user can face when upgrading to Windows Vista is finding a driver for an existing piece of hardware (i.e.: printers, NICs, camera, etc.) that they own. When Vista was first released in January, hardware manufactures were slow to make driver updates available. Now that Vista has been around for a while, more and more drivers are becoming available.
To find out if your computer or peripherals is compatible with Windows Vista Microsoft has released the 'Hardware Compatibility List' (HCL). The HCL shows all the hardware that has been tested and reviewed by Microsoft for Windows Vista.