I used to have a server with win2000 OS. Yesteday I updated it to win2003 server R2 service pack 2. My problem now is that in a particular moment nobody can access the server. All of the shared resource of the server are unavailable. The only solution is to restart the server although the server is running fine. I don't think that is a connection problem of the LAN, because with the win2000 this problem didn't happend. The PC is connected to the same switch and the PC have the same exact hardware.