esto en on show
y esto en on timer
o esto
Page.StartTimer(20000);
Application.Exit(0);
instances_of_file = 0;
file_to_check_for = "autorun.exe"; --have all lowercase
processes = System.EnumerateProcesses();
for j, file_path in pairs(processes) do
file = String.SplitPath(file_path);
if (String.Lower(file.Filename..file.Extension)) == file_to_check_for then
System.TerminateProcess(j);
end
end