Installation problem over natty

[Dbugger]

Hi guys.

Ive bought a new computer and Im trying to install Ubuntu, but the startup freezes everytime with this screen:

Link to image: http://i.stack.imgur.com/3pg2H.jpg

Im trying to install 11.10 here. The curious thing is that with Natty, seems to work allright!

What is wrong??

[zvacet]

Did you check md5sum like described at https://help.ubuntu.com/community/HowToMD5SUM and burn disc on lower possible speed?Did you checked disc for errors when you boot it for a first time?