How to delete all defunct

Computer names in Finder under 'SHARING'????????
We have 3 computer names no longer on the network that still show up on finder, how do I delete those?
It is so confusing.
Thanks so much for your help in advance.

Guess no one knows the answer?

You see those machines even after a reboot? I've found that the computers on the network come and go as the computers do..

Regards

You could try deleting the com.apple.finder.plist file in your user/library folder. This would reset all your preferences too, though.