ntdll.dll is one of the main windows libraries.
If you do something with it you will need reinstall windows again.

Try to update chipset and CPU driver.
If it doesn't help, you need to wait for next patch, or play on another computer.

Will the next pacth solve the problem?? I have already latest cpu drivers i have installed them a year ago!

I'm not a developer to tell you something about next patch.

The game is so beautiful, so I wasn´t surprised when I saw the fps, it´s almost the same performance in Crysis and Cryostasis on my computer.