Computer says "no"

In fact my work box decided to constantly say that it was "unable to run" just about everything so i pretty much took it as read that the nearly three year old installation of Windows 2000 had finally eat itself. But we can rebuild it, we have the technology and it's been lying around waiting for a few final parts for a couple of weeks now; the new version of the machine known as Ikaruga goes from 1.5GHz up to 2GHz and now has three (count 'em) 80Gb hard drives... and none of my development software so i've got a couple of days installing to get through before it'w workable! [Sigh]