I'm not buying that.
Dungeon Keeper 2 was unstable right from its release in 1999. In my opinion, it never left beta status.
The original version with the 1.7 patch still crashes in Win XP regularly and the sound stuttering can only be resolved by a tweak to dxdiag.exe.
It was a rushed release back then and still is and gog.com shouldn't cater to such developers or continue advertising for it.
They (Peter Molyneux or Bullfrog or whoever) won't ever patch it, so just let go.
The odd thing is I have owned DK2 boxed versions in the past and it has never given any real problems. I still have the original DK release box somewhere around here and while it is a more stable game (apart from the issues i had with MP) I don't understand why you have this reaction to a game which at least for me runs perfectly fine.
Another quick point. Its a game from 1999 are you expecting it to be fixed for contemporary hardware now? When the studio no longer even exists (merged with EA UK back in 2004).
The GOG version runs fine for me so far.