Try disabling unnecessary items from your startup list, it could be some process thats trying to close during the shutdown.Also to make things smoother, run a disk cleanup, chkdsk and defragment ur drive. Will improve ur boot and shutdown. This is a useful link, check it out too.
My computer does not shut down completely. I get the MS sound, it tells me I'm logging off and it hangs with the screen saying Windows is shutting down. It does this about 60% on all shutdowns. Anybody any ideas? My OS is XP