unable to install Windows 7 SP1

Hi, I have been trying to install Windows 7 SP1 (KB976932) but It doesn't work Following the instructions from Microsoft (Découvrir comment installer Windows 7 Service Pack 1 (SP1) (http://windows.microsoft.com/fr-fr/windows7/learn-how-to-install-windows-7-service-pack-1-sp1)), I started first to use Windows Update, but it doesn't offer to install the SP1... So I downloaded "Windows 7 et...