Windows 2000 Server – No Shutdown

I installed Windows 2000 Server on my machine and it will not shutdown, when I use restart or shutdown, it makes a noise as if the computer shutsdown but the harddrives and fan remain on, and the monitor goes black with a blinking cursor in the upper left hand corner of the sreen. I went to Cnet and update the registry as recommended and it did not solve the problem please advise. Thanks