BsHup,
To tell you the truth this is a Windows Problem with your system. I am not sure how to tell you what to try to fix this, other than Reformat the system. This ntdll.dll is a critical part of the OS, and if something is crashing this, then you have major problems.
There may be one of our clients that is in the forums that will have a better understanding of what this exact file does. I am sure we will get some more answers.
Here are some sites that Google came up with when I searched for the ntdll.dll file
http://www.google.com/search?sourcei...ntdll%2Edll%22
Take a look at some of these, they may give you some answers also.