i want play demo and get an error with kernel.dll -.- what this?

no idea, never heard of it. Did u try to check something from the official forums? there should be 1 sticy thread that has lots of questions and aswers to em.

u could always try to reinstall the game :\ or boot you comp dunno

if you're running windows 2000 you will get this error. Solution: get Xp or vista as those are the only OS's it will run on