After Dark for DOS (ver 1.0) Abandonware After Dark is a "screensaver" that was originally created for Microsoft Windows, but was later ported to DOS. While the Windows version earned a bad reputation with IT departments, the DOS version is actually quite stable. The minimum idle setting for the TSR is 5 minutes. Please read "RUNNING.TXT", as the software configuration has been modified slightly from the way the Installer tries to do things.