I've had this computer for a while and haven't needed iTunes. Well, now I do, so I've tried to download it, but when it's done i get an error message. "an error occurred during the installation of assembly" followed by a lot of complicated numbers. Apparently I need to update my computer with Windows Update. Which DOESN'T WORK. I've googled the error codes it gives me and nothing is helping me. I have no idea what to do. Can anyone help out?