When for whatever reason you want to play the original dungeon keeper and you did not download the free version that GOG.com gave away nor want to use KeeperFX take a look at this troubleshooter:
https://gamefixes.wordpress.com/cate...eper-dungeons/
I had to reinstall my windows, and DK did not work for me without running the "dungeon keeper 95 Windows 7 64-bit compatibility fix".
Without it, after the splash screen I get a black 640x480 square in the top left of my screen before it crashes to desktop. You can download it on that site, but I've also attached it here: dungeonkeeper95_win7_64bit.7z
It also has a fix for the strange colors.
If you want to reduce the speed of the game see this post here.
EDIT: Link is dead. Attached the file: advanced_game_loader.zip