4/27/16 and 4/28/16 I've downloaded 16.04 Iso direct and by torrent. I wrote it to usb using Universal USB Installer 188.8.131.52 which I have used countless times to write USB ISO files for trying out various flavors of Ubuntu.
However, this particular 16.04 download will not install, nor will it allow me to run the trial without installing. I tried it on two different flash drives, re downloaded just in case the file was corrupted during download. formated the usb drives and re wrote it to usb. It's just not working and I'm wondering if the source file is corrupt. I checked the MD5SUMS of the downloaded ISO and its correct, so my only thought is maybe the source file has a bug in it?
I've had zero problems with Lubuntu 15.10, Xubuntu 12.04 , Ubuntu 16.04