Windows Vista Business - Automatic logoffs

[napajejenunedk0]

http://www.divshare.com/download/2634986-261
http://www.divshare.com/download/2634987-571
http://www.divshare.com/download/2634988-172

Here are some visual materials that represent the reason for this post. What is the way to solve the current situation? Googling around I found a workaround of the problem - to edit the recovery settings of the service "DCOM Server Process Launcher" so that it restarts itself not the computer. The DCOM is mentioned because it was problematic before. Now the "Plug and play" service causes problems. Give me a clue...