Graphics type glitch

[numberland]

I'm playing Lego Lord of Rings on Windows 7 installed from steam. I've checked the system requirements and I more than meet them. I am however getting weird crashes. This look like graphics crashes to me - they either glitch with the screen going weird red and distorted (see http://instagram.com/p/YgHRU6vXXK/ - unrecoverable) or blue screen. Both of these seem to only happen with LEGO Lord of the Rings. The only clue I have is that occasionally when I start the game an error message flashes up but too fast to read saying something about an error with colours. I can't find a way to read the message as it flashes up for a fraction of a second and I'm not sure where it might be logged. Help would be appreciated.