I have several problems since I am running vista (6000, 32 bits). I can make no update since on 18/03/08, I still have the same code 0x80080005. Can not install windows live messenger 2008, neither the beta version 2009. can not install yahoo messenger, Itunes (even patched), Windows Defender does not work and so on. unable to install SP1. When I try to manually download an update, I have the following message during installation "virus & spyware definitions update failed ", what should i do. Please help.