It is very costly to support products on older Os, as well as newer OS. At some point support for particular OS has to be cut off. Indeed, even those of us using Windows 2000 are affected by such cutoffs, as a number of products require at least Windows XP. In particualar, once my NAV 2006 license expires, I would have to move on to another AV oroduct as NAV 2007 requires at least Win XP. One solution may be to replace a drive with a larger drive and add WSin XP as part of my multiboot system. Of course, adding the cost of the repacement drive and the Windows XP license, it may be easier to just purchase a Wiin xP system and add Vista at an appropriate time.