Now, this is a bit of a catch all, as your problems could be many and varied. But this is sometimes the problem, you’ve downloaded an ISO from VMware’s website and, during the download of the ISO, it has become corrupted. What you should do after the download of any of these important files is check the md5sum value from VMware’s website to your downloaded copy. Those of you who use Linux as your desktop OS can use, from the command-land, the command md5sum. But if you are a Windows users you might want to download this package which allows you to do the same check from a Microsoft OS.