If u have already installed the updates, go to c:\windows\Software Distribution folder. There will be a download folder inside it. It will have many folders with wierd names.. like "b56cb336738217d91222cb81fd28b079". Inside all these folders, there would be a folder named "update". Inside this "update" folder, there will be a file "update.exe".. These files are the setups for the updates. So just make a backup of "C:\Windows\Software Distribution\Download" folder.. And you have all your updates!