LuisCosio.com

Microsoft allows large hardware manufacturers (e.g. ASUS, HP, Dell) to ship their products containing a Windows Vista installation that does NOT require any kind of product activation as this might be considered an unnecessary inconvenience for the end-user. Instead these so-called ‘Royalty OEMs’ are granted the right to embed certain license information into their hardware products, which can be validated by Windows Vista…

http://www.haklabs.com/2007/bypass-vista-activation-with-paradox/