Could you past back the screenshot of error or your screen here.
Did you installed latest update for Windows?
Did you installed any software before this problem happen?
Also take a look at:
http://social.msdn.microsoft.com/Forums/en-US/windowsdeveloperpreviewgeneral/thread/91a7293d-eda1-44f5-86a0-18b7e775cfae
I installed the latest updates , no i dint install any software before this happened it was their when i got windows developer preview for the 1st time
Screenshots
http://i40.tinypic.com/25080pe.png
http://i41.tinypic.com/zvepn6.png
http://i43.tinypic.com/30svjv7.png
http://i40.tinypic.com/13z5qc5.jpg
thanks for replying Cyber :)
but i really need help!!!!!