Existe um programa gratuito chamado Insomnia que manterá o computador acordado enquanto estiver em execução.
Como o link já foi alterado uma vez, aqui está a parte importante da fonte do programa retirada do link acima, para que possa ser reproduzida se o link cair permanentemente.
public partial class Window1 : Window
{
private uint m_previousExecutionState;
public Window1()
{
InitializeComponent();
// Set new state to prevent system sleep (note: still allows screen saver)
m_previousExecutionState = NativeMethods.SetThreadExecutionState(
NativeMethods.ES_CONTINUOUS | NativeMethods.ES_SYSTEM_REQUIRED);
if (0 == m_previousExecutionState)
{
MessageBox.Show("Call to SetThreadExecutionState failed unexpectedly.",
Title, MessageBoxButton.OK, MessageBoxImage.Error);
// No way to recover; fail gracefully
Close();
}
}
protected override void OnClosed(System.EventArgs e)
{
base.OnClosed(e);
// Restore previous state
if (0 == NativeMethods.SetThreadExecutionState(m_previousExecutionState))
{
// No way to recover; already exiting
}
}
private void Hyperlink_RequestNavigate(object sender, RequestNavigateEventArgs e)
{
// Start an instance of the NavigateUri (in a browser window)
Process.Start(((Hyperlink)sender).NavigateUri.ToString());
}
}
internal static class NativeMethods
{
// Import SetThreadExecutionState Win32 API and necessary flags
[DllImport("kernel32.dll")]
public static extern uint SetThreadExecutionState(uint esFlags);
public const uint ES_CONTINUOUS = 0x80000000;
public const uint ES_SYSTEM_REQUIRED = 0x00000001;
}