Can you export video created with the trial version Premiere elements 15?

I have put together video clips made with my Nikon D7000. I used to do this on iMovie but I was looking for a program to use on my PC. I can watch the video I created on Adobe Premiere Elements (with the mentioned logo imposed) and I wanted to see how easy it was to save on a USB drive for others to watch on a computer. It took an hour and said it was completed (in MP4 file format). When I click on the video saved to my USB drive is tells me, "Can't play. This file isn't playable. That might be because the file type is unsupported, the file extension is incorrect, or the file is corrupt. 0xc00d36c4". There is a different MP4 video on the USB that I created on iMovie that I can play with no problem. The video I created was supposed to be just under 3 GB's but what on the USB drive is only 1KB so something went wrong with the export. I tried it twice with the same results. I am currently trying to save it to my desktop to see if that works. Thanks for any advice you may have