"Overwriting a copy of Windows with the same CD -- or even a copy borrowed from a friend -- is something Microsoft would love dearly to collect a copyright fee for. Yet Microsoft products are so decrepit and unreliable, it is almost guaranteed that reinstallations will be necessary; if not to preserve the product, then certainly to restore its original performance by producing a clean Registry and an untangled file structure. Should Microsoft's waiver of warranty in its shrinkwrap license or its online license allow it the right to charge you for the "right" to repair what you have paid for already? I say NO. A copy is not a copy, if it does not result in an additional copy."
FULL STORY @ OSOPINION (http://www.osopinion.com/Opinions/TomNadeau/TomNadeau57.html)