Well,I downlaod a exploits of Ms04011,Then I tried it on Win2000 pro,it works,and returned a system shell,I successfully created an admin account.

But when I attempted to use it to windows xp pro sp1,it said lass.exe has error ended,the machine is to be shutdown with in one minute and 30 seconds.What's going on?By the way,there isn't any firewalls on the machine.Anyone can help me?