Ah that explains it, it wasn't clear from your original post. Ah, I think you're referring to this quote from your expert Pete Guttman : "Separately, all the extra encryption required to meet Vista’s content protection standards means some computer components can never enter power-saving mode, he said. Thus, when you play a movie your CPU keeps running at full steam, he said. The extra power demands make it hard to reduce electricity usage." “It’s a bit of an extreme claim, but you could say Windows Vista causes global warming, because it’s burning so much power with all this nonsense,” http://www.networkworld.com/news/2007/0809...def.html?page=2 Reality has really caught up with this false statement. Despite what this mr Guttman says, there is no prove of any of that. As to the global warming thing : it's really, really farfetched to use that as a attention grabber. The other claims of Guttman also don't survive any real tests. If editing the policy, registry and installing non-ms apps to enable things is not hacking, then yes, it's not hacking. I consider it hacking though. Again : also consider the difference in license cost. Default installation is indeed a bit large. I used Vlite to remove unwanted languages and features that I won't use.