use warnings;
use strict;
my $max_attempts = 5;

# for windows, replace cat with type
my $reboot_number = `cat reboot_attempts` || 0;
if ($reboot_number++ < $max_attempts) {
  `echo $reboot_number > reboot_attempts`;
  print "Rebooting...\n";
  # code to make computer reboot here
}