im trying to install sp2 but i keeps failing but doesnt give a reason - the icon in the bottem right corner said that updates were ready so i click it, then it said " how do you want to install updates, windows found 1 update. this update requires that you first accept and end user license argeement then i click express install, then install and it says read the following eula etc, i clicked accept, then it says initializing installation, then says updates were unable to be successfully installed then the following updates were not installed - Windows xp service pack 2. whats wrong with it. any help would be great