A few links with procedures to take...They should help:
How To Shut Down Unnecessary Start Up Programs
How To Clean Unwanted Files From The Hard Drive
Make sure to run Scandisk and Defrag after doing the procedures above.
AFter that, check the link below:
How to Troubleshoot Windows Me Shutdown Problems
Hope this helps.
When I try to shut down my computer I get a black screen with a green bar going across the top of the screen and it just hangs there so I then have to press the reset button and perform a disc scan when I boot up again.
This problem is not happening everytime I shutdown my computer but I would say quite regularily if I have been on the net for a long time .