Original fine corrupted

I did a test, the other day, of the adobe podcast software. Somewhere around the hour and a half mark the recording just stopped. We noticed right away and started a new project to finish our test cast. I have successfully downloaded and unzipped the second part. The first part downloads, but will not open. My computer says its incompatible. My phone and tablet say the file is too large to open. I downloaded WinRAR and that lets me see the subfolders, but says the files are corrupted. I have downloaded it several times. I have tried downloading in a different browser. I have restarted my whole computer. I can not access the original files.