my $Folder;
my $Readme;
SWITCH:
{
   ($operatingsystem eq '170') and do {
          $Folder='winvista';
          $Readme='readme_winvista.txt';
          last SWITCH;
    } 
   ($operatingsystem eq '173') and do {
          $Folder='winvista64';
          $Readme='readme_winvista64.txt';
          last SWITCH;
    } 
}