Note that Wikipedia is not exactly correct on Vista and later. See <a href="http:&#x2F;&#x2F;www.siao2.com&#x2F;2008&#x2F;03&#x2F;25&#x2F;8334796.aspx" rel="nofollow">http:&#x2F;&#x2F;www.siao2.com&#x2F;2008&#x2F;03&#x2F;25&#x2F;8334796.aspx</a> for the real story.