here's a little perl program that should run on windows as long as you change 
the path of the perl and nsradmin commands to match your locations:

#!/usr/bin/perl

$nsradmin_query = ("show name;comment;client OS type;NetWorker version \nprint 
type: NSR client");

@output=`echo "$nsradmin_query" | /opt/networker/bin/nsradmin -i -`;
chomp @output;

foreach (@output)
{
   ($front, $back) = split(/:/,$_);
   $front=~ s/^\s+//;  #remove leading whitespaces
   $back=~ s/^\s+//;   #remove leading whitespaces
   if ($front =~ /^name/)
        { print "\n"; }
   print $back;
}

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