[ubuntu-uk] Trouble with 14.04 live USB stick

[Gordon Burgess-Parker]

Hi,
I downloaded 14.04, checked MD5, burned to a USP stick using unetbootin.
Booted from the USB stick, ckecked disk, all OK.
Clicked on "Try Ubuntu" and the screen went grey and then this appeared:

https://drive.google.com/file/d/0B7c0iOOzxM3LRk5HOVRaODRLQ1E/edit?usp=sharing

The computer is a Lenovo U410 with Windows 8.1 update 1 installed.
Alive USB stick with 13.04 on it works perfectly OK.

Can anyone suggest anything?

Cheers

Gordon