When I try to play the 20th Ann. edition, I go to 'play intro' and other than 'anowor.exe is no longer working', I get no real error message and then the game closes.

The 15th Ann. edition works and plays fine. I'd be okay with this, except it's not the version I want to play, call me picky, but I'm weird like that.

I am running - Windows Vista Basic, Home Edition on a Dell Inspiron 1420 - I know this probably won't help, but I'm hoping anyway.

Does anybody have a workaround or solution for this issue?

I'm using windows 10, and it's happening to me the same way, the game show an error and exits, when you capture and we are locked at the beginning, it doesn't finish the scene.

the 15th version is not available.

Same here, I had to use the Amiga version included

English:
I managed to solve on windows 10 (I guess it works on others too) using the “GOG Galaxy”, you need to play from there connected to the internet, that way you can finish the game.
next time if it's possible to play offline, that's how I managed to fix it.

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Español:
Logré solucionar en windows 10 (supongo funciona en los demás también) usando el "GOG Galaxy", es necesario jugar desde allí conectado a internet, de esa forma se puede terminar el juego.
La próxima vez si es posible jugar sin conexión, fue como logré solucionar.