Did you get the one part download, or the three part download?
If you got the three part one, you need all three parts of it, for it to work.
Parts 1, 2, and 3, and if any one of them is corrupt, it will not work.
Only one part of it, will also not work.
Also, do not try to extract it to the root of drive C:, that will often fail due to windows security settings.
Winrar is pretty damned reliable, and I have used it many times for the game, so if you got the file from here, it is not a problem with winrar.
Also, what exactly does the error say, that could be a big help.
The three part download.
View attachment 2979835