okay..another problem..ive download the offline java windows installer .. i open the installer .. gets to "cofiguring windows installer " and this error pops up

:"This installation package could not be opened. Verify that the package exists and that you can access it, or contact the application vendor to verify that this is a valid windows installer package:"

thats the error.. and im administrator on this machine..and it exists ? its in the folder??? .. valid windows installer package ? wells i downloaded it off the site.. via offline mode..was 16MB and i donwloaded the windows version .. so i cant possibly think wats wrong..HELP!?!..