Hi , Microsoft Windows (OS) is changing drastically from Vista. They are bringing in powerful UAC and Windows update mechanism (its good). With windows vista all the patches/hot-fixes will be managed by WUA(Windows Update Agent). Also the registry key management is changing. No registry key/s will be updated or added for any new patches installed (correct me if i am wrong). Thanks God. They(MS) is providing api to check for hot-fixes and patches. However the b/sad news; they are enforcing WUA(vista style) mechanism for XP and 2K. In 2K/XP every patch installed has a corresponding registry key. My query; With this new mechanism applied to XP/2K will it stop adding/updating registry entry for new hot-fix/patches. Please respond asap. Thanks in advance, Regards, ~Nazir