C:\test>type junk86.pl
#! perl -sw
use strict;

my $last;
while( <> ) {
    if( /processed/ ){
        if( $last ) {
            print( $last );
            undef( $last )
        }
        print;
    }
    else{
        $last = $_;
    }
}

C:\test>type junk.dat
**start abc
**start adl
**start xyz
File1 processed
File2 processed
**start zxcv
**start wert
File3 processed
File4 processed

C:\test>junk86 junk.dat >junk.new

C:\test>type junk.new
**start xyz
File1 processed
File2 processed
**start wert
File3 processed
File4 processed
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