14.04 Live won't boot up

[Gordonbp531]

Downloaded the 14.04 iso, checked the MD5 sum, all OK.
Created a bootable USB stick and booted from it.
Got the screen that says "Do you want to try Ubuntu" etc, clicked on that, screen gows grey for a bit then this happens: (sorry about the image, I had to take it with my phone!)

253234

[kansasnoob]

Instead of waiting for this screen (http://pix.toile-libre.org/upload/original/1354179916.png) to appear, as soon as this screen (http://doc.ubuntu-fr.org/_media/installation/live_cd_maverick1.png?cache=) appears press enter, then you'll see the advanced boot options (http://pix.toile-libre.org/upload/original/1354180067.png). From that screen select Check disc for defects and wait for it to complete - it takes several minutes.

If that shows no errors we'll probably need to gather some hardware info so what OS is currently running on that system?

[Gordonbp531]

Hi, Disk check shows no problems.
The machine is a Lenovo U410, 8GB RAM.
It has Windows 8.1 installed - but Live CDs for Ubuntu 13.04 and 13.10 both work perfectly OK on this machine.

[Gordonbp531]

Looks like the 14.04 live USB doesn't like USB3 ports.
I tried it in a USB 2 port and it all works perfectly OK.