I have some strange problem. I have PC with Ubuntu 12.10. It works fine, but I found about Elementary OS and wanted to give it a try. I burned CD and tried to boot up system from it. It's not working. I see for a moment a black screen with white icons represents keyboard and "universal access" app. I thought that maybe cd didn't burned well or maybe something wrong with .iso. So I downloaded it again - and this time, I used USB stick. Exact same effect. But funniest thing is that - I also got same problem when tried install Ubuntu 12.04. Still Ubuntu 12.10 booted and worked fine.
Then I thought, maybe if I clean whole HDD something just start to work. Nope. After using gparted live cd, still same effect. I got really scared - but Windows as well as Ubuntu 12.10 installs fine.
Anyone know what's going on and how to fix it?
EDIT: My PC spec: GeForce GTX 550Ti, 4 GB ram, Intel Core i5-2400 CPU @ 3.10GHz × 4