Double check the size of the downloaded file with what the size listed in the download center.
delete the file you downloaded, then try downloading again.
if you get the option to Download or Open it, make sure you select the Download Option, do not select the open it option.
you may also want to try downloading with a different browser, sometimes the browser will cache the corrupted download, and just re download the corruption.
Thanks I downloaded again with your advice, seems to be working.