What hardware changes can be made without re-activating?

Hardware changes that do not invoke the Windows Vista re-activation process may vary based on how you acquired Windows Vista. For example: • If you acquired Windows Vista via retail purchase (boxed product) or pre-installed on a computer from a local computer vendor, Windows Vista will not require re-activation if you, for example: • Replace the hard disk drive only. • Replace the video card and add system memory at the same time. • If you acquired Windows Vista pre-installed on a computer from a major manufacturer (sometimes referred to as an Original Equipment Manufacturer or OEM), Windows Vista will require re-activation if you replace the motherboard with a motherboard not provided by the OEM. • If you acquired Windows Vista via a volume license upgrade visit the Windows Vista Volume Activation page.  more