Still having the same problem... is there no way to fix it????
A friend had the same problem, he solved it by reformatting his PC.
I don't wanna reformat my PC, it will take days.. =/
edit:
Problem solved!!!!
http://shoutbox.menthix.net/showthread.php?tid=97559
The problem is caused by Nvidia optimus, you have to let it automatically set the preferred GPU.