Oops... That code will not work for you either as NETVIEW also returns the description even with the /b switch.

Well you get the idea. There are many ways to get the list and pinging them first as in one of the original scripts I posted for you. That should speeds things up for systems that not online. Systems can show in the NETVIEW or NET VIEW list for 15 minutes or so after they have been shut down.

Anyways... get a list of computer names and edit the file so that ONLY the names are in it with nothing else and then use WMIConfirm as shown and you should be good to go.
You may want to add more logging to file or something to see when or where a system could not be contacted.