Marque, Windows 64 will not work with most current hardware. But it is already available in a limited release for those who have recently purchased a compatible 64-bit system and have and are willing to trade in an XP Pro OEM license. Unfortunately, lots of hardware drivers are not yet available, and from what I've read at microsoft.com, plenty of folks are still having troubles with it. In other words, unless you particularly like headaches, you might want to save and invest those pennies for a good little while yet before making the leap.