Windows vista 64    problem  with ntdll.dll file hangs poser8 at render  , all 4 cpus will be working at full , and then thired way throught the render it stops as if the render is completed and then crashes.    

Has anyone else had this  problem ?

Haven't had that, and you should report it to SM for sure, but you might try to disable "Separate Process" in Edit menu -> General Preferences -> Render.

yes i talked to SM about it and they told me that i could update my video card driver to see if that would work , and that it looked like the problem might be with the windows file and i would need to take the problem with Microsoft so i did  they had a lot on the problem with the ntdll.dll file but only for Win XP not vista 64, so got in contact with them and they said it was not there problem and i would need to contact the computers manufacture, can you see where this is going LOL

Disable "Separate Process" and see if it lets you work around it.

Ill try that

try reading rhis

http://www.computerhope.com/issues/ch000961.htm
http://www.computerhope.com/issues/ch000960.htm
its mainly driver updates that might help.